Ive got a 302 bored .040 over to a 306 there is some contraversy if the heads are gunna work with the cam i need some help its got a 579 lift with a 289 292 duration on the cam just using e7 heads that have been ported and polished with 1.6 roller rockers there have been people saying piston slap cam wont work with those heads put in your info and let me know .......