It's an 8600..full floating 14 bolt in the rear. Doesn't have anywhere near the suspension that my Ford does though, and I think it rides pretty dang nice for a truck. Just me climbing up into the bed makes it bounce a bit, whereas I can jump on the bed of the Ford, and it doesn't feel like it's moving at all (it's not seized..driving my K5 up on the trailer behind it definitely makes the rear drop down a bit.)
I live in Phoenix, Arizona. Only salt we see here is on the supper table, lol. Heck, even my '59 International 2 ton truck only has a very small amount of rust in the floor boards.
