I just bought a 67 firebird 400 convertable less motor a trans. I got the documentation from pontiac hist. serv. It came with 400 and 4spd. I cant find what kind of four spd it originally came with though. Would it be a muncie? or sag.Thanks,Tyson

Muncie M-20, wide ratio.

Q

Tyson,

Q is indeed correct. If you need any casting #'s I have a correct '67 M-20 in my basement that I will eventually be putting in my bird. Here's a great site to find some additional info.

http://www.dandltransmission.com/muncieratio.html

Vince

Here is also a helpful page for identifying a mystery Muncie trans, if it turns out NOT to be the original:

http://www.5speeds.com/muncie2.htm

Q