The following items have be replaced to no avail on fixing the problem,ignition switch,ballast restor and mogle,it starts but does not stay running plenty of spark and fuel,coil tests, good anyone have any ideas help 1968 roadrunner. thanks

dies immediately after releasing the key or after a bit? Recent problem? always done it? Any part changes/adjustments right BEFORE the problem started

if you've changed all that stuff with known good parts the issue has to be in the wiring between the switch and the ballast, when it makes the transition between start and run. it's 2 different circuits.

so now you eliminated the ballast which is normally what this would be, unless it is bad again, which you check for continuity.

second you eliminated the ignition switch, but again, could still be bad.

the next thing to check for voltage at the ballast, then back track to the bulkhead connector till you find your missing power.

Have you done an electronic ignition conversion, I am guessing yes since you mention the module.

Try looking at the pickup coil inside the distributor. This seems to have the signs of a failed one.

If this is a car with the ign swithc mounted on the column, actuated by a rod from the lock cyl, that switch could be not adjusted/located properly.

Robert,I just was going to take the car to a show when this problem occured,no changes were made before hand. I even checked the fuel pump
thanks

If its not the pickup coil, you can also check the grounds to the ignition module.

My eddy 1406 would stall for no reason at idle regularly & it was dirt in the idle circuit. A 2 second blast of starting fluid into each idle mixture screw hole took care of it (repeated twice in a weeks' time). But from your descrip you're thinking it is an electrical prob?. I would clean the bulkhead brass terminals for a start

Throw the ORANGE ignition box in the trash and replace it with 1 from your local parts house...

my car does the exact same thing.it only happens every once in a while.if i unplug and replug the ballast she will start.i know this sounds odd,but it works.someone told me its a bad wire on the ballast but im yet to find it.

The problem is likely in the connector from the ignition switch to the bulkhead.

Mine would occasionally do that, and when I looked deeper into the problem, I found this: