Bronco IIs are excellent trucks, in my opinion. There are a few things to avoid, though:
- A4LD auto transmission. You've probably heard of this tranny; it's junk. Through good maintenance, and a large tranny cooler, it will be somewhat reliable, but nowhere near what a C3/C4/C5 would be.
- Dana 28 TTB. If you like to snap axle shafts, get the D28. It's an OK axle if you don't abuse it, but if you want to run a locker, forget about it. The Dana 35 is infinetely tougher, but is only available on late 89/90 B2s.
- 2.9 V6. I'm a bit biased here, because I love this engine. It will run for 300K miles if you treat it right, and maintain it, BUT.. Watch out for cracked heads, and valvetrain oiling problems on abused engines. IF you're checking out a used truck, make sure that you run the engine to operating temp. This is where the valvetrain noise will start to show up if the engine is abused, and if the heads are cracked, white exhaust from burning coolant will be present. Another check for cracked heads is the dipstick or oil filler cap. The oil will look like any water contaminated oil: light brown. 2.9s with cracked heads typically have a vaseline "milkshake" substance at the bottom of the oil filler cap, although sometimes this can also be caused by excess condensation due to a bad PCV, or short driving trips
- 2.8 V6. Another good engine, but a terrible feedback carburetor system and TFI ignition were used, where a traditional carb and Duraspark should have been. Duraspark conversion is easy to do, and this engine is rock solid.
- 3.45 gears. Useless, avoid at all cost. 3.73, 4.10, and even 4.56 were available stock. There were also L/S axles, but they're rare.
The advantage of a B2 as a trail rig is that they're so damn small. I can't count the number of times that I've hung with full size, lifted and locked rigs on the trail, simply because I could drive around or through most of the stuff that they had to drive over.
Hope this info helps