all F-superduties were delivered from the factory as 2 wheel drives.
there were a few companies that did 4 wheel drive conversions on them , the most popular probably was Marmon-Harrington.
you can pretty much get anything you need for the truck by asking for parts for an 88 F-350, except for the rear axle and parking brake assembly. that is a dana 80, and has either 4.56, 4.63, or 5.13 gear ratios.
I just got one and am shocked at how heavy its built. I can't find much info on it though. Any info would be appreciated.
The F-Super Duty 1987-97 (the original super duty prior to '99 pickups) was introduced to bridge the gap from the F350 to medium duty trucks. It was a commercial cab & chassis 2WD dually only optioned truck.
Known at the time as the "One Ton Plus." It sports a HD frame,the hydroboost brake system w/ 4 wheel disc brakes.Though they are 2WD trucks,they are equipped with 4WD transmissions but,rather than a transfer case,they come with a drive line emergency/parking brake. A HD dana 80 rear axle that came from ford with gear ratio options intended for two purposes; heavy hauling & towing.They came in various wheelbase lengths with up to a 15,000 LB GVWR.It's widely known as the F-450 equivalent with many auto stores listing parts under either name.
These trucks are easy to spot with their pickup size cabs,yet unique F-Super Duty fender emblems & 10 lug wheels.
axle code 72 = 4.63
axle code 73 = 5.13