1993 Ranger with 3.0l
If so the spark system is self contained, doesn't use the fuel injection computer for startup
Run your hand around bell housing to see if any wires might have gotten pinched when you were bolting it up to the engine, not at all uncommon to have that happen
When key is turned on the computer boots up and the CEL(check engine light) should come on, if not then computer is not powering up, so no fuel injectors.
Fuel pump
You should hear the fuel pump run for 2 seconds, but only 2 seconds, when you turn the key on(assuming computer is booting up)
Its not quiet, you can hear it in the cab, a HUMMMM, for 2 seconds
Turn key on and off as much as you like to either determine you do or do NOT hear it
If you don't hear it then you found the problem
There is a 20amp fuse in engine fuse box for the fuel pump, I think #22
There is also a Fuel Pump(FP) relay in that fuse box
It should "click" closed for 2 seconds then "click" open, each time key is turned on
This relay sends 12volts to inertia switch, see above post by blackwidow