It is a power booster out of another 1st gen Trooper that was better than my original. I may have gotten it out of a V6 model but cannot remember if it was or not. Of course I am not sure there is a difference between the two though.
OK, yeah, supposedly, you can get one outta a 3.1 Rodeo and it will be a little bigger/better. The 2nd gen front brake setup is a must if you ask me, something you might look into also.