'65 V8 904 core

Halifax - There are no big block 904s - this is for the LA small block, I am not sure if it would work with the 318 Poly but I think it would.
Robert - Assuming you mean the output shaft for the later type slip yolk? This has the flange for the trunion type driveshaft. As far as I am aware in terms of small blocks and slants the slip yolk design went into production for '66.