Hi there, I am new to this forum and I am new to Chevys (mostly a Ford guy, GASP!). But I have a very nice 89 suburban with a tbi 350 and a TH400, and a complete 91 suburban (still a square body) with a tbi 350 and a 4l80e. I would love to swap the 4L80E from the 91 to the 89, what do I need to...