[quote=fast68plymouth]Honestly, the chances of a fast rate hyd cam pulling strong up to 6500 in a BB is pretty slim. [/quote What’s your reason? spring, lifter float or harmonics? Reason being I took out a cam from a 383 that did 6500 then into a stock low compression 440 that was hard to get to 5000. Tried 3 sets of springs and no change. 509 cam. Ideas?
