My holley is driving me crazy. I have cleaned it, Adjusted the floats, checked the power valve, and changed the cam on the acc. pump. Sometimes it will idle perfect and other times it will flood very bad. Last night it was flooding so bad that when it wouldn't start, I got out & looked at it and it had gas about an inch deep on top of the butterflies. I banged on the front bowl and got it to stop. Engine finally started. The biggest problem is that it has no top end.It runs like a scalded dog from 1/4 to 1/2 throttle, but when I floor it & the engine gets to about 4000 rpm's it has no power!! Then, after I let off of it, I can feel it trying to foul plugs. What in the heck is wrong with this thing??? Please help. Oh yeah, I adjusted the air screws too.