hey, i am currently in the middle of a build and am curious on what cam i can use without having clearance issues. i currently have a 75' 454 2 bolt main bored .030 over with what i believe to be a stock crank turned .020 under both main and rod. i have speed pro .100 domed pistons with ported and polished matching heads dual valve springs and 1.72 ratio roller rockers. i am just curious what cam lift and duration i can run. im running this motor in a 79 chevy 1 ton for offroad use mostly. with the occasional mud drags and what not. any info would be much appreciated as most of my expierience is in john deere diesels