Ignition Issue, motor wont stay running

[bbmopars]

71 Duster, Got a 360 magnum swap, hei dsitributior factory collumn, carbureted.

Motor fires right up as soon as you turn the key to engage the starter, but if you let go of the key it instantly dies.

If you hold the key in the start position the motor will keep running as long as you hold it....

Any idea what wires might be switched/crossed?

I have that same problem with mine,l already replace the resistor.l have just a points distributor in it not hei.l have a 383 in it

 

[67Dart273]

Very good!