I found this website a couple of years ago. Go to the 700R4 link for detailed tranny swap and explanation. Also some other good detailed pages of upgrades.
You might want to bring other ideas to the board from this. ( I just saw on on spraying line-x inside whole blazer) Its been a while since I went through it all and might like to see some of it again.
http://www.off-road.com/4x4web/proje...er/blazin.html