rebuilding a (for now ) 350 for my 66. just mostly stock stuff motor.except i'd like to put on a set of later model centerbolt heads because of chamber size. my ?'s are do the newer heads ( 193's, 810's castings) have screw in studs? i would like to use a cam i found in the 480 lift range. is this possible without pulling studs or using guideplates? if not how much lift can i use without expecting problems? like i said this is a for now engine that will see limited use,but i need to have my car mobile this winter because it's going to the bodyshop for some touchup stuff. grovey