Ok guys, I've just rebuilt my 302 and its an 84 and the heads are not what Im looking for. Its a non roller block and Im looking for a cheap set of heads. I cant afford any quality used heads like Im wanting so I was wondering if I could swap some 351W heads on mine? If they do fit would I need different length pushrods or arms? In theory I could take some roller heads swap guide plates and arms with my non roller right?