Looking for info on LS1 based 4 wheel drive conversions?

[FirstGen]

Hey guys, haven't been on here in a while! Glad to see the forum is doing well. I have a friend looking to put an LS1 in his Blazer and while I did it in my C10 pickup a few years back I'm not as familiar with the 4 wheel drive stuff.
I was hoping there was someone on here that could point me in the right direction.
I posted this in the Blazer section also but it doesn't look like there is much activity over there.
Couldn't find anything in the search...