That is in my garage now guys....It is NOT a 65,and it is a quality rebuild as far as machining,but the original owner built it for a Riviera project and it never got completed. It is now listed on here in Parts for Sale because I was told that it was an original GS motor,but it is not. It is a 63 block and crank as verified by Loren,and you would have to either change the crank or use an adapter for a newer trans. I have some extra pieces if someone wants to build it. I think I may even have a good 65 crank core.The block itself is the same from 62-66,but there are more crankshaft differences than I was aware of.