It's an M20. My original was an M21. When I pulled it and installed the Saginaw (which at the time I was told was a T-10) I absolutely LOVED the low first gear. SO based on that, this guy told me I would want the M20 set up.
This guy's garage is nuts! He has Muncies lined up by year, all taged with dates etc. He goes so far as to put a clear cover on the side so you can see everything inside is new, and everything works etc. The guy is a perfectionist. When he sells one he gives you an entire card with all the specs. etc.
