Better off with after market aluminum heads or the indy cylinder heads iron ones, forget the name of them. If you must have mopar parts, w2 heads but then they require intake and headers to match. Best stock heads are 308’s. Swirl ports with closed chamber I believe. If you want to move the pushrods in any heads the hole can tubed (expensive). Alterating pushrod geometry is never a good thing, not that the mopar small block has real good geometry to begin with unless you have a 48 degree tappet bore angle R block to begin with.
