I am going to be running a 347 stroker, 30lb injectors, 255 pump, victor jr(210cc, 60cc chambers,2.05int 1.60exh) victor intake, 75mm tb & maf. My cam i have is .540int and .563exh(TF stg2) w/1.6 rockers, my dyno guy (first time talking) said my heads were two big for cam and recomended a cam with .625-.650int....to me this sounds to big and id run into valve clearance probs. I wasn;t getting anywhere asking him, i dont think he understood my question. Since I am building the thing do i need to adj the valve clearance if i get a cam that big? will one that big wokr? how do you adj valve clearance? BTW i have bought pistons(18cc .030" forged,dished) already....