Bought this 91 Suburban a few months ago. It had 4in Superlift springs up front and aluminum blocks in the rear. I found a Dana 60/14ff a few weeks later and have been slowly rebuilding them the last 5-6 weeks when time permitted. Got them finished up and under the Suburban yesterday. Still not finished (waiting on brake lines, gotta change u joint in driveshaft, reinstall sway bar,etc.) I got a lot of swap parts from ORD. Install has gone pretty smooth so far. I found a ton of info on this site. Thanks to all you guys. I'm going to work on posting a few pics.