Interesting, you may want to ask Marlin if your gear driven Tcase (attached to a G58) will physically bolt up to a G52/G54, or W56 gearbox? Those all accomodate a 21 spline Tcase input shaft. If your Tcase won't bolt to them, it certainly won't bolt to a R151F robbed from a 22R-TE equipped vehicle - even if you replace your Tcase's original input shaft with a 23 splne unit.
My presumption is the R151F behind the 1KZ engine and the R150F behind the 3.0 liter v6's use the same chain driven Tcase.
Therefore the only thing I can say for sure is that one can bolt a R151F from a 86-87 turbo truck (22R-TE) or a R150F from a 3.0 liter v6 truck to the 1KZ bellhousing. The bellhousing to gearbox bolt pattern matches, and the gearbox input shaft length is 160 mm - same as the stock R151F behind the 1KZ's bellhousing.
