The R154 Supra trans bolts to the later Dodge truck manual bellhousings. It is a 5 speed used in the '87-'92 (MKIII Turbo) and the shifter is in roughly the right location.

I have seen a full bodied, full interior MKIII at Infineon do a lot of passes with 600+ horsepower, back-halved for a Ford 9" and slicks...Stock tranny.

Sandy in Nova Scotia has one in a Mopar IIRC and I saw it advertized as a swap in kit form in Oz. Most of the tech info I find on the swap is from Marlin Crawler's forum running one behind a 5.9 Magnum in a 2WD.