what do you check for the clearance for the cam? the cam is a lunanti that came with the systemax 11 kit. is lift a problem?. the price difference of a 350 4 bolt and 383 4 bolt is about $350. might as well do it. have to find out what else is going to have to be changed. is ther a book that can be bought. it has been almost 50 years since i drop a 331 cu caddy into my 50 ford.