UPDATE: I recieved a call from a guy who said these are for Chevy/GM 250 C.I. 6 cylinder so take it for what it's worth. I have a large tub of these pistons but do not know what engines they fit. Look like Chevy V-8 or V-6 to me but who knows? They appear to be .030 oversize and are cast GM made pistons. There are no wrist pins.....................just the pistons. Will do 8 for 40 or 6 for 35. If you know what they fit...................share Lol! Call if interested. Thanx