until you decide to turn it into a play truck and not a daily driver... get a new rear end... grab the entire axle out of a ZR2 s10 blazer or highrider GMC.. look for the G80 Axle code in the glove box.. Short of that your talking custom work and with the ZR2 axles you might have to relocate the spring perch's on the axles...
ONCE its becomes a full time i dont give a fk truck and you want to do it stupid cheap and trailer it to and from dumont.. weld the spiders.