If I was goint to do an sas on a taco I would use the prerunner, its perfect! Just think, it doesnt have the diff on the wrong side so you dont have to spend any extra $$ on adapters for that. The trans is a w59 so all you do is pull it and use its bellhousing on a 4wd w56 with duals behind it. The front axle isnt really an issue, either use a chevy dana 44 or a fj80 front end, either one would be about the correct width.
