It looks like an SM-420 from a 1-ton or bigger truck. I think the band-type parking brake was not used on the 1/2 and 3/4 ton models, but that's just a guess. Other than finding the proper floorboard cover and a shift stick, it would be a pretty straightforward swap on any truck with an open driveline. You might need to modify the driveshaft to mate up with the tranny.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!