The nice thing about some of those old trucks is they have a trailing link supension. That means easier to lower, better traction (it tries to lift the rear as you get on it), and they come with a 12 bolt.I would try to get one as loaded as you can find. A/C, Power steering, and disk brakes would be a must.
2006 Superior Blue Trailblazer SS AWD, Stock as a rock
Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).
Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning