I'd look at an older 3/4 ton. Will have at least a Dana 60 rear and a 44 front. Be better set up for towing/off road. In CA it shouldn't be hard to find one with no rust. I'd go reg cab long box or ext cab short box. To get one with fuel injection worth anything you'd be looking at a '92 or later (92 the 5.2 magnum came out, 93 was the 5.9), the earlier TBI truck are gutless. U could get a big block til '78. They're prone to rusting around the drip rail at the front of the cab, if one is rusty there move one,not an easy fix. Happy hunting!