67Rocket

I am looking for a M20 to go in my 67 Cutlass, do I need to look for any specific GM transmission? A lot of vendors out there but I trust you guys. Thanks

edzolz

E-mail this shop, jon@kajonjon.com

72455442RA

stay away from the early 64 65 325 case trannys

Dave Siltman

I have an excellent original from a 1972 that I bought from a well respected member here. This unit still wears the original ID tag and inspector's stamp. 1972 units have a fine spline input shaft and the large output shaft. PM me if interested.

oldsmobiledave

The 71-73 M-20 units are the best of the M-20s.

66trakpak

I have a 73 M20 perfect condition fine input and big output shaft. Pm if interested.

crash

The 26 spline input/32spline output Muncie's are 3/4" longer the 10 spline input/27 spline output Muncie's...

Hope this helps... Crash

RAG

Any Muncie will work fine, unless you drag race it don't worry about the early ones. I just picked up a M-20 with the date code of November 1967 if you are interested in it.

edzolz

Never heard this. Where do you get your info?

crash

Its pretty much common knowledge among rebuilder, early Muncie is 21 1/4" long, late Muncie is 22" long...

Hope this helps... Crash