Thread: 496 street build

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Iron heads will not tolerate a lot of static compression ratio when using pump gas, so most fellows will try to stay around 9.5:1 these days to prevent detonation. This would mean a 124cc chamber and 17cc pop-up on the piston, or 123/18 or 122/19 or 121/20 or 120/21 or 119/22 or 118/23 or 117/24 or 116/25 or whatever to create a 9.6:1 static compression ratio. I would add the crank radius, rod length and piston compression height together and cut the block decks to that figure, for a zero deck. I would then use a Fel-Pro SFL1037 head gasket to produce a 0.039" squish/quench to minimize detonation.

Howards retrofit hydraulic roller camshaft and lifters kit, part number CL120245-10, along with 98636-K32 spring, retainer and lock kit and 93321 seals. Uses 10 degree valve lock angle, must use matching retainers and locks.
1800-5400 rpm operating range
278/284 degrees advertised duration, 225/231 0.050" duration, Hydraulic Intensity 53.
0.567"/0.578" valve lift w/1.7 rockers
110 degrees Lobe Separation Angle
106 degree intake centerline
114 degree exhaust centerline
https://www.summitracing.com/parts/hrs-cl120245-10

Weiand 8019 Stealth intake manifold, Rochester Quadrajet by Cliff Ruggles, 14" X 4" air cleaner so the motor can breathe.
https://www.summitracing.com/parts/w...make/chevrolet
https://cliffshighperformance.com/

Long-tube stainless headers (ebay) with either a H-pipe or X-pipe immediately after the collectors, mufflers and pipes to the rear bumper. Nothing sounds more hinky than pipes terminating under the vehicle and reverberating against the sheet metal underneath.

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