Would like to find a ready to go . Odds are it'll ba a later H body one since it'll have the reverse switch & a flat tailhousing.You looking for a ready to rock and roll unit or a 'some work required item here? I do happen to have two of them, one from a 75 V8 Chev Monza and another from an 82-83? Camaro. Pretty sure both of them will be needing synchros plus a thorough cleaning.
Back before I decided to commit heresy by stuffing a Muncie in my Monte, I started to collect the bits needed to plug in a Saginaw, until I remembered how fragile they really were! Turned out to be more cost effective to build the M-20 Super. (Different first gear and matching cluster, among other changes)
Biggest hassle getting it to you would be the method of transport. Too big to mail . I might even have that dumb-*ss transmission mount that doubled as the mounting arm for the cat. Not sure what shape it is in.
Would probably have to go Purolator.