[GTOonTHEgo]

Hi yall i got this at a swap meet today for a 100 bucks. I had planned on going and buying one from a local here in town but locked out and found this...
Everything im reading say 66-67 m22 but the guy with the other trans swears its junk and an m20 and i got ripped off(of course) but i dont know. This is my first muncie and i dont care what shape its in im thrilled to have it and tinker on it (hoping to learn to rebuild) i previously had a sagnaw 2 grove 4 spd so anything is better than that...aside from automatic (but maybe not)

The p code is p01013 nothing after the 3
the case is 3885010
the cover where the shifter goes is 3831707
The input shaft has no groves