[Gobuffalo]

I just started this swap in my 70 Suburban. If I may, here is my 2 cents.
I called Advanced Adapters and asked to buy the proper parts for this. He asked what I already had. A 1982 205 (figure 8) and adapter bolted to a TH400. I'm installing a 4L80E from a 2 wheel drive with 2 speed sensors. He told me as long as it is the full splined shaft, I had every thing I needed. He said cut off 1 1/2" of the output shaft and have a machine shop cut the indexing ring on the adapter to 4.800". You may have to grind on the adapter foot a little if the pan hits.
It worked sweet!

P.S. The machine work, new gaskets and seals cost $100.00.