"I have a .040" over 400 with stock #16 heads and ram air IV cam, q-jet w/ iron intake, 9:1 CR. No problems with pump gas (91 octane)."
And it shouldn't have any troubles, as the real RAIV cam has over 80 degrees of overlap and 308/320 seat to seat duration.
With that cam you could easily go another full point on the compression and it would still run fine on pump fuel.
Have you ever performed a cranking compression test? Just curious what the results were?......Cliff
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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