Well okay guys, something just isnt right with my chevy 350, It just dosnt have the power it needs, and it randomly backfires but very randomly and not often. i have a 570 cfm carb on it and it dosnt even want to accept the secondaries opening even though it should be too small of a carb (it wants the stiff black secondary spring) and at wot it dosnt want to accelerate after 40 mph. Ive tried to diagnose the problem today by putting the engine on tdc, i pulled the dist. Cap and the rotor was a tooth after it being exactly lined up with the #1 spark plug pick up so i retarded it by 1 tooth taking it back to point at the #1 cylinder and went to go fire up the engine and it didnt want to start! So we advanced it aton to even get it running and it wouldnt even take any gas with out stalling. Why would it run with the dist. A tooth retarted but not with the rotor pointing right at #1? is it possible that in the past when i changed the timing set i have the cam a tooth off? Or do i have a cam that requires a degree timing set? At idle it ran good at 15 degree advance, and if i remember correctly it got to 36 degrees total advance. Thanks for the help and im more then willing to answer any questions!