found this sticker on top of the transmission and started rubbing the dirt off (and with it, off came a few of the digits LOL) went to mitsubishipartswarehouse to cross reference it with the transmission for the 1989 V6 and the full number is MD733481.
so, it appears that the 03-72 is the same as the KM148 (so far).
apparently, this transmission has been sitting on a wreckers shelf since august 24, 1993 and had 58,958 miles when removed. (they even provided some paperwork that seems legit)
hopefully it's not damaged from whatever caused that rig to go to the wreckers in the first place.