I am running a 3.4 swap into a formerly 22RE 4Runner, with a R151 tranny. ORS did it, and did it very very well. The drive train must be moved forward about 3", and the shifter is now a homebrew snakey thing that works just fine.

If I did it again? I'd use a 3.4 and R150 complete. The modern R150s shift much better. You will need a V6 plate if you do that. Also, a 23 spline tcase input is needed no matter which option you choose.

Don't waste your time on a 3.0, it is all the work and cost of a 3.4, and relatively little benefit. The 3.4 absolutely rocks.