Originally Posted by V8&4spd
It's a 26 spline from the early 70s. There are 2 rings on the input shaft, it may be a M20. I am not familar with the fine spline Muncies.
Yea hensaid he was pretty sure it was an m22. I wont be upset if it's not though. I'll have to pull the side cover and check it out. I only paid $900 for it with the shifter and cross member so even if it is an m20 i'll still be happy with it.