Not sure about the width but there are a few more things I was wondering about. First is the bolt patern. I don't remember hearing GM putting D60's in the rear of there trucks but Ford and Dodge both have but they have different bolt patterns than the GM's did.
The other thing I was thinking about was the ABS on the 95. Im not sure if there are any sensors or not in the rear brakes like there are on the front but if there is and the D60 doesn't have ABS I doubt it will work for ya.
Good luck...Personaly I think you should check out a 14BoltSF instead but thats if you were keeping it. Just go and get another 10bolt from a wreckers and throw it on. I can pick one up up here for under $500 and thats for a newer one.
93 GMC Yukon
Chevy SuperStock 4x4 Truck Puller
Great Lakes Truck & Tractor Pulling Association