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ThanX fishy, I appreciate the assistance. After typing this quick last night I checked some things because after re-reading it didn't sound right. I'm running the timing at 8deg before not retarded as I previously stated. It's a 4150 holley carb and yes it was used and sat for a few months...

I'm having carb problems and was reading through the tech stuff and think I need a blow proof power valve. I was running a Edelbrock 750cfm and it ran fine. I bolted on this Holly 4340 double pumper and its running like crap. I shot the timing and have it at 8deg retarded but when I set the...