Installing mopar Electronic distributor

68 barracuda 340
I bought the car with the distributor and ECU missing
And was giving the Mopar electronic distributor and orange box with my purchase.
I initially dropped the Dist in and the orange box in and it fired right up I thought I was good.
Then I went to get gas for the first time and barley made it back it would stall wait cool off start back up made it home.
So I figured I’d better use the ballast resistor it came with and harness but no luck firing it now.
Maybe coil crapped out?