Use a spark tester like a spark plug with the electrode cut off. You want to see a good blue or whitish blue spark that can jump at least 1/4 inch.
Go buy a noid light for a couple buck and plug it into one of the injector wire connectors. It should flash once every engine revolution. Now if you have that and 40 psi it should run.
It sounds like maybe a heat soak problem. Don't overlook the after market ignition module, NOBODY makes one as good as Ford does. I would rather have a junkyard Motorcraft module than a new one from NAPA or anyone else.
It sounds like you have some basic diagnostic skills but get frustrated and go to throwing parts at it.
Also if you have the TFI type of module (on side of dist.) don't forget the dielectric grease. It helps conduct away the heat from the module. It will not live long without this.