I have a fresh pair of 318 Mopar #302 heads. Small swirl chamber but prior to Magnum style. Cleaned and checked for cracks, skim cut .005, fresh 3-angle valve job, a couple of new valves, cut for Perfect Circle type seals, rotators removed, new Crane springs set for .450-.460 lift cam. Ready to bolt on. I paid $100 for the cores and have $450 in them at the machine shop for parts and labor. Would just like to get my $450 back. Thanks, Gene. Four10...Nine82...Four042