if it would not crank sounds like maybe it's the starting circut. you may be barkin' up the wrong tree with the ignition circut. you could wire up a jumper from the battery to see if it's the starting circut wiring. if you can get the starter to crank it's prob the wiring. hope i didn't misunderstand you said it would turn over but not crank. you could also wire a jumper to the hei dist since it takes 12 volts i think, but if you are getting enough fire to the plugs don't think that would help.