Quote:
Originally Posted by Tim Corcoran
My concern is 9.0 compression, power steering, power brakes, air-conditioning auto trans and I need to have good vacuum a strong steady idle and it has to be reliable to to take on trips. And the fact that it has RA/HO exhaust manifolds and full exhaust. Doesn't less duration build dynamic compression.
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IMHO you are a little conservative with that Lunati cam. I would bump it up a notch. You are a bit limited with the 2500 rpm stall speed and compression ratio. Years ago I built a 4" stroke 455 topped with 285 cfm RAIV heads, 9.5 compression, factory manifolds and an original intake manifold. I used an aggressive HFT camshaft that was 228/236 540/510 on a 114. It had a smooth idle (sounded like an 068 in a 389) and ran mid 12's around 110. I always thought that would be the minimum cam for that combination.