I just finished a complete rewire on my 66 Lemans. When trying to fire it up the engine starts but as soon as I let off the key it dies. I know there are some other posts about this but I read them all and none of them have what I'm looking for. The engine is a Pontiac 400, it has hei and no balast resistor. I did a little research and found that I needed a wire from the R terminal on my solenoid to the coil terminal on the distributor. So I pulled the ignition wire from the coil and doubled up that wire and the new 12 gauge wire on the solenoid and reconnected to the coil on the distributor and tried to fire it up again and the same problem persists. I'm starting to think it is my ignition switch, although it was fine when I took the whole car apart for restoration about 5 years ago. If this is the case could I replace the ignition lock cylinder or would I have to buy a whole new switch? I'm sure the switch housing is fine since everything electrical on it is working as it should. Does anyone agree that it could be the switch, are there other things to look at etc.? Also how would I go about replacing the lock cylinder if that ends up being what I have to do? Thank you everyone!