I was happy after spending $350 of stashed away money for this '80 1/2 ton 4x4 Suburban. It has a 350, TH350/NP205, 12-bolt and 10-bolt, with all the power options, tilt column, and ice cold A/C that worked so good I had to turn it off of the normal setting cause it was getting too cold. Then after logging about 165 miles on it and some time in the field, the rear end started making noises. Sounds like a Gov-Loc kicking in and out and starting to act up. Oh well... maybe I'll just throw 3/4 ton axles under it for now and keep driving it.