89 5.0 block, unknown bore, i don't have a way to check it unless i can find a different part number on the bottom of the pistons. Je 517f forged pistons, comp cam, canton 7qt pan. mains are studded. It was in a car i bought, supposedly low miles. Ran great lots of power. Suppose to be 12.5.1 compression. When i pulled the heads i could smell race fuel.
Im selling the shortblock for Cheap because i cant use it with boost so its no use to me. $500 FIRM. I know it can be parted out for more than that. The pistons alone cost double or more than double the asking price for the whole block and the pan is 300 new. The heads were tfs twisted wedge and arent for sale at this time.