The only other yota trans that will easily bolt up to the 3.slow is a r151f. It'll also bolt up to a 23 spline 4 cyl case directly. But for the cost of a r151f you could buy 2 adapters to mate a 4 cyl case to a r150f.....
You could also swap the output housing on the r150f to one from a r151f but then again cost would suck.
