IMHO, depends on how good the parts in stock are along with budget. How much power vs how much rpm you will'n to go? If have the $, go stroker kit from Ace with the best block in inventory. Same with the 13 or 62 heads. Aftermarket heads same thing. Unless the ones you have need lots of work. Sell'm to # matching guys to pay for aftermarkets. E-hds for round port hdrs(better), or kre d-ports(built be someone else).
