is there anybody running the new line of cams by comp cams the thumpr line. r these cams made just for sound or are they a performance cam as well? i plan on using it in a 385 sbc. the thumpr cam i am plannin on using is the 1900-5600rpm 497/511 lift 227/241 @ 050. have any major performance shops did a dyno run on an engine using the thumpr cams? is chp later on going to run an article on these retrofit hydraulic rollers?