Ok! been looking over different pages, trying to decipher the info on the trans I recently received. I do know that it is a New Process, but, having problems figuring out what the preceding numbers should be,435,450, or 465. Cast housing, aluminum rectangle top, twin PTO ports. casting numbers on the case are C-91171,11X3XSPE, and AL, on the top is C-92802, hand brake attached to the case, and band brake on tail output. Any info is appreciated, before I try to stuff this into my '53 2 ton.