Sbc intake torque specs aluminum heads

I love my coffee as much as the next cup (and the one after), but tolerance to its effects can be a real bummer. If you want to feel like you can outrun a cheetah again, try a brie...

Object moved to here.As far as the nut torque spec, go to ARP's site and look it up, they are all different depending on the size, length and style of the stud. There are more than one stud style for the SBC, so look it up by the part # of the studs you have. The fact that the heads are aluminum makes no difference. ARP torque specs are frequently different than ...When it comes to optimizing the performance of your Kohler engine, one crucial factor that cannot be overlooked is the torque specifications. Torque specs refer to the specific amo...We upgraded the heads to a pair of TFS Super 23 aluminum castings to ensure we got the most out of each intake. The heads feature a 215cc intake port with 2.08/1.60-inch stainless-steel valves and ...25 lb/ft for the intake > Edelbrock Alum Heads. 110 lb/ft for the top row of head bolts , 100 lb/ft for the bottom row (closest to the spark plugs) These are specs for a 390 FE. Just did this setup. Also depends on if you are using studs or ARP bolts, or the original head bolts.. Check the install sheet that came with the heads. Save Share. Like.

Not for use on Gen II 1992-96 LT1/LT4 engines with reverse-flow cooling system. Fast Burn Aluminum Cylinder Head Assembly. • CNC-machined aluminum performance cylinder head. • Completely assembled with …In most cases you don't need to retorque head bolts or studs. If the bolts or studs aren't tight you will lose compression or get coolant in your cylinders. You can use bolts or studs based on ...The GM torque spec is for steel bolts going into steel heads. If you have aluminum heads, you should be applying the bolt torque specified by the manufacture of the heads. Bolt torque into aluminum is usually something in the range of 1/2 to 2/3 of the torque applied by the same bolt into steel.I am going to clean up the threads and see what happens but wanted to know how much torque can the threads handle. I do not want to remove intake and all the other stuff. Call me a lazy. Retorqued at 11 ft lbs the motor idles at 1400rpm, obviously an intake leak. If retorqued to 30 ft lbs will stop intake leak maybe.54.23 N-m. Years: All. Note: Chevy Small Block - Red Loctite. GM 5.7L-350ci-V8-SM-BLOCK Engine Torque Specs. Over 6,000 Automotive Torque Specs. Search Car Torque Specifications by Engine or Model.Chevrolet LS Gen. 4 Aluminum Block Torque Specs. Views: The following specs apply to RPO codes: ... 80 degrees: Outer Studs: 51 degrees: Side Bolts-18 ft.-lbs. Connecting Rod Bolts: 15 ft.-lbs.-85 degrees: Cylinder Head Bolts: M11 x 2.0 x 155.5: 22 ft.-lbs. 90 degrees: 70 degrees: M8 x 1.25 x 46.0 ... Fasteners that list an angle are Torque to ...

5 Best Aluminum Heads for Small Block Chevy. No comment (s) 4.3 (86%) 20 vote [s] DNA Motoring CYLH-SBC-350. High Grade Aluminum, Bronze Valve Guides, Hardened Seats. 200 Cc Intake Runner With A 68 Cc Combustion Chamber. Lighter Than Iron Heads. Check Price. Replacement for Chevy Small Block SBC 200Cc.example shows six holes in the deck of a small block head*. lay a head gasket on the . deck, noting where the gasket covers the holes in the deck; punch at least a 3/8” hole in the . head gasket. this procedure can be done to both head gaskets to improve . water circulation. * #4 and #6 hole locations do not apply to the ik ® series heads.Details. The Edelbrock #60899 Performer RPM cylinder head is designed for 1955-86 Small-Block Chevy applications. The Edelbrock #60899 Performer RPM head is perfect for street performance, daily drivers, street rods and muscle cars where seat-of-the-pants performance is needed. This cylinder head delivers great throttle response and power …ALUMINUM CYLINDER HEADS: These heads deliver significant gains in both power and torque for all Small Block Chevrolet applications – right out of the box. Pro Action™ SBC Aluminum Cylinder Heads are the perfect choice for a variety of performance engines, including street rod, muscle car, oval track and drag racing applications.21 Jul 2020 ... ... torque specs and make sure you follow the specified patterns. Thanks for watching! Get Your Set of Edelbrock Aluminum Heads Here: https ...

Hyperspace toys pensacola.

These lightweight aluminum heads bolt up to your small block Chevy and feature 195cc intake/75cc exhaust runners, 64cc combustion chambers, and 2.02" intake/1.60" exhaust valves. They're fully assembled with valve springs, retainers, locks, guide plates, studs, and seals. Maximum output for less money! Designed and produced by BluePrint Engines. Full-CNC. Speedmaster™ CNC ported cylinder heads are machined on dedicated 4-axis and 5-axis CNC machining centers to ensure accuracy and cost effectiveness. Combustion Chamber, Exhaust and Intake Ports all fully CNC machined for better flow. CNC combustion chambers offer superior control over flame travel and quench area. M-6507-J302 Intake Valve, 1.94” dia. x 5.078" VS-305V Valve Seal 4705F-1 Valve Spring Seat/Locator Features and Specifications: Head material Aluminum Intake port location Raised approximately .100” Intake port volume 178 cc's Intake valve part number M-6507-J302 Intake Valve Head Diameter 1.94" I used the fel pro 1010 on my sbc with dart aluminum heads they worked fine. by jmarkaudio » Thu Feb 07, 2008 4:19 am. 1010 are OK with a stock bore and is a copper ring, a little close on a 4.155 or more. 1003 and 1004 used to be regular wire ring, 1014 and 1034 were pre-flattened wire.If using Fel-Pro Print-O-Seal, or any silicone beaded gasket, you must apply a small strip of silicone to both the deck flange of the cylinder head, Part #5023, 5025 Rev. 6/20/12 - QT/mc. Page 1 of 2. ©2012 Edelbrock LLC Brochure #63-5023. as shown in Figure 1 on the next page, and the at same location on the surface of the block to prevent ...Despite the LT1’s engineering shortcomings up front, it was a terrific factory small block sporting a nodular iron crank, powdered metal “cracked” connecting rods, and hypereutectic pistons. In 1992, the LT1 yielded 300 hp. By the end of production in 1997, it was making 330 factory ponies in the powerful LT4.

Chevrolet LS Gen. 4 Aluminum Block Torque Specs. Views: The following specs apply to RPO codes: ... 80 degrees: Outer Studs: 51 degrees: Side Bolts-18 ft.-lbs. Connecting Rod Bolts: 15 ft.-lbs.-85 degrees: Cylinder Head Bolts: M11 x 2.0 x 155.5: 22 ft.-lbs. 90 degrees: 70 degrees: M8 x 1.25 x 46.0 ... Fasteners that list an angle are Torque to ...Received 1,275 Likes on 815 Posts. Torque Specs stay the same, cast iron or aluminum heads. Over torque causes cylinders to distort but I have never heard of a change in torque aluminum head to cast iron or visa versa. A performance engine or any engine will always benefit from taking the torque down evenly in 3 steps IE: 35 Lbs, 55 Lbs, to ...Sbc Intake Torque Specs Aluminum Heads, SB Chevy Aluminum Cylinder Head 195cc Assembled (Sold as a Pair) , Torque Specs and Bolt Patterns for Small Block Engines – RacingJunk News. ... Lower Intake Manifold Torque Spec and Sequence GM Forum Buick, Cadillac, Olds, GMC Pontiac chat.Sbc Intake Torque Specs Aluminum Heads, SB Chevy Aluminum Cylinder Head 195cc Assembled (Sold as a Pair) , Torque Specs and Bolt Patterns for Small Block Engines – RacingJunk News. ... Lower Intake Manifold Torque Spec and Sequence GM Forum Buick, Cadillac, Olds, GMC Pontiac chat.413 posts · Joined 2001. #1 · May 26, 2004. I'm now going to install my manifold and then headers onto my (pro topline) aluminum heads. I'm using ARP bolts for the manifold, and ARP studs for the headers. ARP says 39ft lbs, but I once stripped out a thread (P.I.T.A.) at 30ft lbs, so im definately wary of doing that again.Full-CNC. Speedmaster™ CNC ported cylinder heads are machined on dedicated 4-axis and 5-axis CNC machining centers to ensure accuracy and cost effectiveness. Combustion Chamber, Exhaust and Intake Ports all fully CNC machined for better flow. CNC combustion chambers offer superior control over flame travel and quench area.If in doubt and if you're using an Edelbrock aluminum intake and heads for example then call their 1-800 number to get the right on the money answer. Some manufactures may specify a different torque value for their products,better to know for sure instead of taking a chance and the messing up the threads. :anim_25: :shakehands:If using Fel-Pro Print-O-Seal, or any silicone beaded gasket, you must apply a small strip of silicone to both the deck flange of the cylinder head, Part #5023, 5025 Rev. 6/20/12 - QT/mc. Page 1 of 2. ©2012 Edelbrock LLC Brochure #63-5023. as shown in Figure 1 on the next page, and the at same location on the surface of the block to prevent ...

ARP thread sealer to head bolt threads, and apply engine oil or ARP lubricant to the head bolt washers and underside of bolt heads. Torque bolts to 65 ft./lbs. in three steps (40-55-65), following the factory tightening sequence (See Figure 3). Check to make sure engine has proper grounds to chassis. When pouring coolant back

Comes fully assembled with heavy duty components. Designed to bolt right up to your small block Chevy engine. Features an all-aluminum construction with a natural finish. Head bolts are tested to over 180,000 PSI and has a 1/2" wrench size and a 1.375" thread length. Head gaskets offer superior heat dissipation and have a compression thickness ...The GM torque spec is for steel bolts going into steel heads. If you have aluminum heads, you should be applying the bolt torque specified by the manufacture of …These specs are for stock-type bolts with light engine oil applied to the threads and the underside of the bolt head. Moly and other lubes offer reduced friction and increased bolt tension, which will affect the torque figure. If you use aftermarket performance bolts like ARP's, you should follow the recommended torque specifications.Fourth Generation (2005-2020) The fourth-generation Chevy small block took the LS series to its full potential. There were the standard LS1 and LS6 replacements, the LS2 and LS3, the front-wheel drive-only LS4, and three record-breaking performance versions, the LS7, LS9, and LSA.The fourth-gen LS intake manifold bolt torque specs …Aluminum (aftermarket) heads and intake manifolds require a different torque than stock cast iron units. Common assembly clearances. (ALWAYS consult your piston manufacturer for recommended clearances. Many pistons require a tighter bore)Intake Manifold, Vortec Head Design. Designed for 283-400-cubic-inch engines using Vortec cylinder heads P/N 12558060, P/N 19300956, P/N 19300955, P/N 19331470, or P/N 19331472. Has 4-bolts per side to attach it to these cylinder heads. Aluminum high-rise design maximizes horsepower and delivers a broad torque curve. Sold as a pair. Uses 3/4 in. reach gasket seat spark plug. Heads are drilled to accept both early style (12 bolt) and late style (8 bolt/Vortec) intake manifolds. Exhaust ports are 1/2 in. raised compared to stock cylinder heads. Welcome to a new class of high performance cylinder heads--BluePrint Muscle Series! bcm66. 4762 posts · Joined 2006. #7 · Sep 15, 2010. I have never used a torque wrench on aluminum intake bolts. Always went with the old timer rule of "get 'em tight - but not too tight". Then check them again after the engine has gone through a couple of heat cycles. 1968 Camaro SS 396 coupe L78 - now old school 468 big block.

Hobby lobby fond du lac.

Harps in heber springs ar.

There isn’t a one-size-fits-all answer as to how tight spark plugs should be. Most vehicle manufacturers recommend using a torque wrench to tighten the plugs to the factory torque (tightness) specifications. You can look up the torque specs in a repair manual or online repair database. In some cases, you might also be able to find the ...GM 350 Intake Manifold Bolts Torque Specifications. by Anne Davis. The 350 is a member of Chevrolet's small block engine family. First built in 1967, this 5.7-liter engine is featured in such vehicles as the Chevrolet Camaro and Nova. Throughout its life, the 350 has had numerous models identified by letter combinations such as L-48 and LT-1.795 posts · Joined 2008. #1 · Jan 19, 2011. ARP head studs 134-4001 call for 80lbft using ARP Ultra Torque lube. That torque reading is based on 75% of the yield strength of the fastener (190,000PSI). So, the ARP studs have a greater tensile strength than stock head bolts allowing more torque to be applied to them.The specifications given are for the typical 350 engine. The Chevrolet 350 cylinder-head torque specification is 65 ft.-lbs. The intake installed onto cast-iron heads requires 30 ft.-lbs. If your engine has aluminum cylinder heads, the threads are more fragile than the cast iron, so the intake specification is 18 ft.-lbs. Comes fully assembled with heavy duty components. Designed to bolt right up to your small block Chevy engine. Features an all-aluminum construction with a natural finish. Head bolts are tested to over 180,000 PSI and has a 1/2" wrench size and a 1.375" thread length. Head gaskets offer superior heat dissipation and have a compression thickness ... HEAD BOLTS or STUDS: High quality head studs or head bolts with hardened washers must be used to prevent galling of the aluminum bolt bosses. Edelbrock Head Bolt Kit #8555 includes two longer-than-stock bolts which must be used with these cylinder heads. If you use any other head bolts, you must use the two head bolts and washers supplied DESCRIPTION: Edelbrock E-Tec 170 cylinder heads are designed for street/high performance use on 302, 327, 350, and 400 c.i.d. Small block Chevrolet engines using …Dave Haertel said: Had to pull the intake and looking for torque specs. 360 and a Weiand Action + intake. Are all intakes the same torque specs? It varies between iron and aluminum heads, but 25ft lbs is an average for iron heads and an aluminum intake. 18 for aluminum heads. This is per Edelbrock instructions. ….

Cylinder Heads, Aluminum, Assembled, 64cc Chamber, 200cc Intake Runner, Chevy, Small Block, .525 in. Lift Max, for Flat Tappet Cam, Pair Part Number: SUM-162112 4.11 out of 5 stars ( 9 )Object moved to here.Received 1,275 Likes on 815 Posts. Torque Specs stay the same, cast iron or aluminum heads. Over torque causes cylinders to distort but I have never heard of a change in torque aluminum head to cast iron or visa versa. A performance engine or any engine will always benefit from taking the torque down evenly in 3 steps IE: 35 Lbs, 55 Lbs, to ...Starter: Standard SBC Stud holes, Head: Blind holes Timing chain/gears Standard SBC components, with 91-02 vortec thrust plate Timing Cover: Can use stock cover or late model vortec cover will work. Torque Specs: #1-#5 7/16” bolts – 65 ft lbs w/CMD #3 #2, #3, #4 3/8” bolts – 35 ft lbs w/CMD #3The Dart Big Block Chevy Pro 1 Aluminum Heads were inspired by Dart's championship-winning Pro Stock designs and available with 310, 325, 345, or 355cc oval or rectangular port intake runners, big block Pro 1 aluminum cylinder heads deliver out-of-the-box airflow that smokes the competition!The Performer RPM Small Block aluminum cylinder heads are designed for Small Block Chevy 265, 283, 302, 305, 307 327, 350 and 400ci engines up to 2003. Performer heads are designed with compact combustion chambers and high-flow ports to increase throttle response and overall performance throughout the RPM power band.Performer RPM #60619, 60639, 60719, 60739, 60889, 60899, 60949, and 60999: Cylinder Heads are designed for use on 1986 & earlier 302, 327, 350, and 400 c.i.d. Chevrolet engines (not centerbolt). NOTE: See “Specifications” section of this instruction sheet for additional cylinder head details such as spark plug position (straight or angled ...What Is The 350 Chevy Intake Manifold Torque Specs? 350 Chevy requires intake manifold torque specs of 30 ft-lbs (for a cast iron head) and 25 ft-lbs (aluminum head). Before tightening, drivers must first confirm which manifold type their car model uses.You have undoubtedly seen aluminum cladding on many homes. The process of cladding refers to the covering of water-permeable materials, such as wood, with Expert Advice On Improvin... Sbc intake torque specs aluminum heads, Place one of the Twisted Wedge 170 cylinder heads on a suitable work stand and install the recommended spark plugs (refer to the Recommended Components chart on the Technical Specifications sheet for specific part numbers). Bolt the exhaust manifold/headers to the cylinder head and check for any interference. , Studs, heads: Must use Dart head studs Studs holes, Head: Blind holes Stud length in block: 1.770” - 1.550” thru + .270 bottom bullet Timing chain/gears Must use raised cam components Timing Cover: Can use stock cover / Mag w/fuel pump provision avail. Torque Specs: 1-5 7/16” studs - 75 ft lbs, Big Block Chevy Head Bolt Torque Specifications. Long Head Bolts 75 - 80 Ft/Lbs. Short Head Bolts 65 - 68 Ft/Lbs. I would also add make sure you torque the bolts in steps. Do a first round hand tight, second round at. 50% torque (OK, let's just say 35 Ft/Lbs) then final round at specs., in the cylinder head. Torque all of the manifold bolts in two steps by the sequence shown in Figure 2to 25 ft/lbs. 5b. Install the intake manifold and hold-down bolts. On applications with Vortec or E-Tec cylinder heads, torque all of the manifo ld bolts in two steps by the sequence shown in Figure 3to 11 ft/lbs † PREP AND TUNING FOR POWER:, Spark plugs. 14 mm. 25 ft. lbs. 25 ft. lbs. * Tips for proper installation of heads gaskets. 1) Cleaning. The most important operation of regasketing your engine is thorough cleaning of the cylinder head, block, bolts, and bolt holes. A dirty bolt can throw off torque readings by as much as 20 ft. lbs. 2) Watch bolt lengths., Various aluminum head vendors recommend 70 ft/lbs on bolts or studs. In the Corvette service manual, Chevrolet recommends different torque for the short, medium and long bolts. I tend to trust ARP, but 80 ft/lbs sounds sounds like a LOT of torque to apply to aluminum heads. The guy at ARP said that if you use their moly thread lube, you can ..., 3. To ensure proper thread engagement and accurate torque readings, clean ALL threads in the block. Chase if necessary with ARP Thread Chaser, part number 911-0004 (7/16-14). 4. Install the cylinder head(s) and check for binding or misalignment. 5. Position the chamfered side of the washer on the bolt so it faces the bolt head., ARP thread sealer to head bolt threads, and apply engine oil or ARP lubricant to the head bolt washers and underside of bolt heads. Torque bolts to 65 ft./lbs. in three steps (40-55-65), following the factory tightening sequence (See Figure 3). Check to make sure engine has proper grounds to chassis. When pouring coolant back , I eed to know which specs to go with eith the Cast Iron specs or the Aluminum block specs below. Any help on this would be greatly appreciated. Chevrolet Big-Block Iron Engines Component Torque Camshaft Sprocket Bolts 20 ft. lbs. Cylinder Head Bolts Long 70 ft. lbs. Short 70 ft. lbs. Cylinder Head Studs Long 65 ft. lbs. Short 65 …, We've all been told not to put aluminum foil in the microwave. Stories of incredible explosions and fires are usually at the center of these ominous warnings. Why is that? Advertis..., Torque Spec: 7/16 in. Outer Main Cap Bolt: 65 ft.-lbs. 7/16 in. Inner Main Cap Bolt: 70 ft.-lbs. 3/8 in. Outer Main Cap Bolt: 40 ft.-lbs. 11/32 in. Connecting Rod Bolt: 38-44 ft.-lbs. 3/8 in. Connecting Rod Bolt: 40-45 ft,-lbs. Cylinder Head Bolts: 65 ft.-lbs. Screw-In Rocker Arm Studs: 50 ft.-lbs. Intake Manifold Bolts (Cast Iron Heads) 30 ft ..., Three things matter the most regarding SBC heads - quality, price, and performance. The FloTek 180cc aluminum alloy casting cylinder heads are the answer. Featuring 180 cc ports with a unique design made for versatility, the FloTek SBC head is one of the best SBC heads for low-end torque. Specialized Department., Small Block Ford Intake Bolt Torque Specifications. 18 Ft/Lbs - Aluminum Heads. 22-25 Ft/Lbs - Iron Heads. Do the torque in 2 steps, first just hand tight, second with the torque wrench. IF you do have a spec from the manufacturer follow that. Make sure threads in the head are clean and in good. shape., ARP thread sealer to head bolt threads, and apply engine oil or ARP lubricant to the head bolt washers and underside of bolt heads. Torque bolts to 65 ft./lbs. in three steps (40-55-65), following the factory tightening sequence (See Figure 3). Check to make sure engine has proper grounds to chassis. When pouring coolant back , AFR's 210cc "Race Ready" and "Competition" heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. Recommended for race applications and aggressive street/ strip builds up to 400 cubic inches, operating up to 6500- 6800 RPM. Included Components. 100% CNC Ported …, Aug 5, 2023 · Bolt Tightening Order And Pattern For Chevy 350 Intake Torque Specs. Step one. Disassembly. Disconnect your battery and drain all coolants. Next, remove all peripheral items: cases in point are fuel lines, engine covers, vacuum lines, wiring connectors, EGR tubes, air intake, and throttle cable. , #1. This weekend im starting my AFR install, Now being that there aluminum im guessing back off on the torque specs a little? Id hate to strip a thread half way …, The Edelbrock installation flyer that came in the box of my RPM Air-Gap intake manifold provides a bolt torque sequence and recommends using a ..., Requires hardened pushrods.; All E-Street Cylinder Heads are sold in pairs; Dyno tests showed a gain of 16 hp and 11 ft-lbs of torque over our overseas competitor; Intake Valve Diameter: 2.02 in : Intake Runner Volume: 185 cc : Material: Aluminum : Push Rod Diameter (Suggested) 0.3125 in : Rocker Stud Diameter: 0.375 in : Valve Angle: 23 deg ..., summitracing.comThis aluminum head from Trick Flow produced 496 lb-ft of torque at 4,000 rpm and 455 horses at 5,300 rpm. With its 195cc intake ports and 215-cfm flow numbers at 0.400-inch lift it ..., You have spoken and we have listened… these small block Chevy compatible heads offer the only two things that matter… performance and price! The features for the IK® 180 / 200 include a revolutionary ultra casting, versatile 180 cc, 200 cc, and 215 cc intake ports that are specifically designed for optimum versatility, and 64 cc or 70 cc ..., Performer RPM #60619, 60639, 60719, 60739, 60889, 60899, 60949, and 60999: Cylinder Heads are designed for use on 1986 & earlier 302, 327, 350, and 400 c.i.d. Chevrolet engines (not centerbolt). NOTE: See “Specifications” section of this instruction sheet for additional cylinder head details such as spark plug position (straight or angled ... , Apr 20, 2023 · Ultimately, the intake manifold bolt torque for LS engines is the same for all variations and code names, and it’s 44 in-lb for the first pass and 89 in-lb for the second and last pass. However, the tightening sequence, as we described, is equally as important. Also, to remove or install an intake manifold on supercharged LS engines, the LS9 ... , We tested these as complete assemblies supplied by Dart. Aside from the material they are made of, the heads seem to differ only in the spark-plug type: the iron heads use short-reach, tapered ..., 22557 posts · Joined 2007. #3 · Aug 1, 2015. Spec for the SBC is 65-70 ft.lbs with factory bolts.....75 ft.lbs isn't going to hurt anything....but if you want to re-torque, it is a good idea, you will find that the gasket has relaxed some under the compressive force of the head, and you will find some bolts seem looser, usually the longer ..., Small Block Ford Intake Bolt Torque Specifications. 18 Ft/Lbs - Aluminum Heads. 22-25 Ft/Lbs - Iron Heads. Do the torque in 2 steps, first just hand tight, second with the torque wrench. IF you do have a spec from the manufacturer follow that. Make sure threads in the head are clean and in good. shape., Don't sacrifice quality for a low price--get both with our Summit Racing™ 64cc aluminum cylinder heads for small Chevy. The lightweight heads are cast from A-356 aluminum alloy and have 200cc intake ports, 64cc combustion chambers, phosphorous bronze valve guides, and ductile iron valve seats for use with unleaded gas., These specs are for stock-type bolts with light engine oil applied to the threads and the underside of the bolt head. Moly and other lubes offer reduced friction and increased bolt tension, which will affect the torque figure. If you use aftermarket performance bolts like ARP's, you should follow the recommended torque specifications., On the plus side, the Vortec intake port flows 42 cfm better than the stock heads at 0.500-inch lift and 18 cfm better on the exhaust side. Vortec Iron, Scoggin-Dickey Modified PN SD8060A2, $779. ..., Hello all, I just bought a set of aluminum heads to install on my 406 sbc. My question was are the torque specs. different on aluminum heads as to the stock cast iron heads?, Our 1402 and 1472 cylinder heads are machined for 7/16" head bolt diameters; all others are machined for 1/2" head bolts. When using heads with 1/2" holes on blocks with 7/16" threads, we recommend using ARP's 254-3708 or 254-4401 kit with their 200-8598 bushings. If you are using ARP hardware, follow their recommended torque specifications., Aluminum (aftermarket) heads and intake manifolds require a different torque than stock cast iron units. Common assembly clearances. (ALWAYS consult your piston manufacturer for recommended …, 7/16 Rocker Arm Stud Kit, intake only, 8 pc ... Chevrolet Big Block Dart aluminum head exhaust bolts only, (8 pieces), ARP Stainless, 12pt Head Bolt Kit. 435-3705: Chevrolet Big Block with Edelbrock Big Victor 12° Heads, 8740, 12pt Head Stud Kit. ...