[YENKO DEUCE REGISTRY]

Thanks for the tips!! I purchased a pump cam kit and found a graph for their parameters, putting the orange one in Friday night. I found that the Pink one that was currently in there didn't activate the acc. pump until the throttle linkage moved almost a 1/4 in" [img]/ubbthreads/images/icons/shocked.gif[/img] It runs much better now, but still needs some more tweaking. I will have to try some of the others to find the one that works best.

I believe that this 780 Holley is too big for the LT1, especially with stock manifolds and smog system. We know for a fact that they run quicker in the 1/4 mile with the secondaries disconnected, (as do the '66 L79 Novas). GM put 780's on the solid lifter big blocks, and our theory goes that they just tossed one on the LT1 knowing that most would have headers installed anyway.

Pete, what did your dyno guy use on your 427/425 test from MCR? I thought he started with a 750 shop carb, and then went to ??