as it seems with your post,with you (and most everybody else) pricey,and consequently un-needed aluminum heads are not in the budget. the aero heads will work great with the combo you are looking to assemble,comp XE268 is a great cam,and any number of manufactures can supply a set of cast pistons to more than suffice. it's amazing the "advice" you can get on here when others are spending your money.......