Heavy Enough
I've towed, more than once, 3000 pounds of sand or gravel in my single axle dump trailer (1800 pounds empty). The trailer has brakes and I've got the brake controller turned up high enough to help slow the truck instead of the other way around. I put in a 160 degree thermostat, and I already have the rear axle from a 96 explorer with the 8.8 and disk brakes to throw on if the one on the truck gives up before I'd like it to.
Honestly, the truck doesn't seem to mind level ground but with that much weight it's not happy about climbing.
1987, 2.9L, 5 sp, 4x4