Steering box was replaced.
Exhaust.
Ball joints.
I think if you get the straight six and the manual transmission you will be very happy with an F150.
Also own 1990 F150 custom with 4.9 liter 6 cylinder and 5 speed manual (2 wheel drive). Have had the truck since new.
Now has 161,000 Kilometers (100,000 miles). Still runs like new.
Except for the battery, filters, plugs and wires, all components under the hood are still original.
Air conditioning has never been serviced, still making cold air.
The body is still solid, no annoying squeaks or rattles. Compared to my GM trucks in the past, this has been by far the best.