I can't remember if I responded to you before or not on this. Probably have. But here it is again.
Oleg installed mine. I received my Tacoma Crawler adapter from from Marlin already mated with a tcase. We had to shorten the rear drive shaft. Work out the shifter\console setup. Mine pokes up through one of 2 cup holders. The most work I believe was in building a custom cross member to facilitate the case. Then a custom skid plate is needed.
I have the standard 2.28 with 5.56 gears in the diffs and it has worked great for over 5 years. You will love it.
Scott Yoder KD0DHP
2000 4Runner, 2.5" lift on 33's, locked, geared & armored.