Tranny identification

[69DISASTER]

I just bought a 1972 C1500 and the tranny in it shifts hard. You almost have to double clutch it. It is definitely not a Muncie but it doesnt even look like a Saginaw. The tailshaft is almost non-existent on it. I mean it looks like the driveshaft practically goes directly into the back of the tranny. Have no pics or numbers yet. Any wild guesses? I looked at one site that had diagrams of Muncie, Saginaw, and Borg Warner's and mine looks nothing like them at all. The gear ratio in this tranny must be some high because at 60mph it feels like the engine is revving about 3500rpm.