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My combination is basically the same, except in mopar land. Its a 318 with stock small valve heads, a 467/494 Crane Cam, Air Gap and 650 DP. 3.54 gear, and 28 inch tire in a 3350 lb plus me and junk in the trunk makes it 3550 raceweight, 68 Dart. The heads are a major restriction, but on 13 lbs the car just went 11.48 @ 120 on pump gas with water/meth. Without boost, im sure it would be a mid 14 second car.
Except I built the kit, didnt buy it.
I wanted to show what could be done with a cheap motor, im willing to bet an edelbrock head swap would be worth 100 horse, easy.
Same experience here....you all know how fast a stock slant 6 is. Put about 30psi into it and it reponds very well! 11.77 @ 116....That was at 3500lbs. Best mph was just short of 118. That's almost 450 at the crank.
Talk about restriction...the stock head flows around 120cfm on the intake and 90 on the exhaust. The stock rockers are about a 1.39 ratio and the cam lift at the valve is around .365 lift.
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