Rear end swap- Anybody know trucks?

Since Chrysler didn't put an 8.75" rear end in anything after 1974, it's hard to know what you're really looking at. I've swapped 8.75" axles into newer trucks, in fact I swapped one from a 74 Power Wagon into an 88 Ramcharger. The axle was a straight-up swap. I don't know the perch width, though. The housing should be about 7" longer, over-all.

http://www.moparts.org/Tech/Archive/axle/16.html