I know that this has probably been asked a million times on this board, but now I guess it's my turn.
Anyway, I have an SM465 tranny and I'm trying to figure out what year truck this might have originally been mounted to. If that's possible of course. Here's the marking that I had gotten of of the tranny (which was stamped in front of the shifter lever)
3901131 (I couldn't tell if that last number was a 1 or a T though)
GM 31
A 283
These are the only numbers that I could find at the time. My garage is full of crap and the lighting wasn't very good
Thanks in advance everyone,
Larry