The build was close to a copy of the one J.B. did for Rob (TuBBed).
We did find a set of TRW forged pistons (inverted dome) that put it at 8.5:1. They were Pontiac pistons so I believe there were adjustments necessary ( pins & crank).
We had stock '70 rods so that may have been part of the problem.
Solid cam 245/253 @ .050
Intake was a stg. 1 with the divider cut 3/4".
Now the wild stuff: We fabbed a 5" spacer between the carb and manifold. (750 Holley) All the duct from the D1 procharger to the carb hat used long radius 90* elbows rather than short radius to help reduce turbulence.
Oil was not the problem as the bearings were fine.
We bent 4 rods, broke 2 others, and bent the crank.
We are thinking it was the cam. Will know more after some more examining.
With the numbers that J.B. made with a n/a engine I really believe these little engines could put their bowtie cousins to shame. With the right parts and setup, a boosted 350 should be able to push 750 - 800 hp and remain healthy.
What do you think? Any thoughts?