Cranks but won't start. Unplug ground at field spade on Alternator and it starts?

Without rereading the entire post ..

Have you verified that you have cranking g voltage to the plus side of the coil during cranking?

The IGN 1 is not active during cranking. And is a make before break type contact that gets power a spit second before the IGN 2 looses power.

If no IGN 2 getting to the coil it will never fire.