My son just bought 'another' race car. This time a Chevrolet S-10 with a 350.
It has cast aluminum heads with 4 additional bolts per side (21).
My brother tells me these heads were off of military powerplants.
Any one every heard of this and are they good for performance use? I've drag raced for many years and seen lots of aftermarket heads, they all seem to have some markings, these don't have anything on them.
Any help would b appreciated