GM to Mopar trans swap?!
Yes. You can look at the transmission and identify it from appearance. You have a service manual? Latest I know of to download (and it's free) is a 73 which would be very similar
http://www.forabodiesonly.com/mopar/showthread.php?p=1970088617
More manuals and info here
http://www.mymopar.com/index.php?pid=31
Some more info
http://www.slantsix.org/articles/4-speeds/3speed-info-swaps/3-speed-swaps.htm
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