I got a set of 1998 3/4 ton 8 lug axles w/4.10 gears: 14 bolt 9.5" ring gear rear with Semi Floating axles, matching front axle from same truck. The rear end will bolt in any 1988+ K series truck. The front axle needs a few mods to put in a 1/2 ton, but it can be done.
Also have rear springs, front torsion bars, and a complete front corner (spindle, caliper, rotor, control arms) that go wth it. Truck had 40K on it when I got them. I no longer have any use for them. I sold my 4x4.
PM me for more info.