I just finished re-assembling my '63 SS, including re-wiring it. 350, ministarter, 4 speed, added a clutch switch, new ignition switch, I added a good used shunt for the amp gage, all new wiring and fuse box, new 10si alternator, battery in the trunk, run up to the starter, ground cable grounded to body and cable going from engine to body. I had installed a Crane XRi electronic point conversion which requires a ballast resistor. Headlights are on a relay. When I start it, the motor cranks fine, then fires, but when I let off the key it dies. I have 12 volts on the ignition ckt to one side of the ballast, and the run ckt on the other which also connects to the B+ of the coil, and goes to the starter, of course. I checked the coil, which is not new, and it has 1.8 ohms on the primary and 11K ohm on the secondary so it checks ok. I thought maybe it was the XRi module, so I put the points back in and it does the same thing, Any advice would be much appreciated.