I backed down my driveway to go for a cruise tonignt and when I stopped to put it in drive it died. The engine cranks and I have fuel so I suspect it's the ignition system. Where would you recommned I start looking. It's a 66 Coronet with a 440/727 combo. Mopar electronic igntion, orange box, ballast resistor. Appreciate any help. The car has been running fine til tonight. Thanks