hi could anyone give me a quick guide on camshafts?? are the highest lift cams for use on drag etc iive been looking on the camshaft application the piper 390 and 564 have massive lifts, why do most people choose the 285 cam for best power?? is it the best all rounder, im looking at a track engine whats best? how much gain/difference is there in the piper 285 and the timing it so its msm spec?