EEC relay? Inertia switch? Fuel Pressure Regulator?
Fairly common failure items on Fords of that vintage.
You should be able to hear the electric fuel pump(s) running when it stalls.
Lift pump in the tank and high-pressure pump on the frame? Those trucks had one of each, IIRC.
Any stored codes?
I'm not sure if Rangers were included in the fuel hose recall or not. On the F-series trucks, they used to have a
metal fuel filter installed in a U-tube near the front of the frame ... which caused a fire hazard. The recall involved installing a
paper element filter in the fuel reservoir, and then replacing the nylon fuel line with a braided steel one.
Also seem to recall something about oil pressure switches and two different circuits (start and run) for powering the fuel pump.
Thought-starters for you.