If I were to do this again, I would buy a totaled RAM 1500 4WD, shorten the chassis and do an entire chassis swap. Since you mentioned mostly GM stuff, maybe get a Tahoe or Suburban and do a chassis swap. It would cost alot less in the long run.
79 Cherokee Chief, barely runs
(Cherokee Build Thread)
11 Nissan Pathfinder Silver Edition 4x4
09 Mazdaspeed3 Grand Touring