HEI distributor

Thanks, I know they weren't HEI originally. They have something inlace similar to a Mallory system, but it is still running through the ballast which is totally weird as HEI's eliminate that. Thanks very much on the distributor source as I have been trying to find one like this. The carb is probably messed up as There had been a fire in the air cleaner probably from a backfire. The whole thing was full of carbon and paint burned on the air cleaner body. One piece at a time, I'll get it.

Johnny,
Thanks for the update. I am in Northwest Ohio, Whitehouse, Ohio. I pulled this Duster from its original owner in Florida. He took amazing care of the car, but all the work was done at shops. I think he got too old to keep up with the car. It sat in Florida outdoors under a cover for about 9 months. That alone can do in an electrical system. Also, other peoples hands started making "adjustments" Cap runs very well, it just needs some smoothing out and there is a gremlin somewhere in the exhaust/carb/intake/ignition. The real owner has great knowledge and some great documentation of fixes that were performed. He is just a bit out of sequence on some dates, and some of the data is a little off. It's a good news bad news story. Good news is the car is complete and running, bad news is the car is complete and running, but I don't know how it was put together. You always know what the funny noise is on a car you built, but you might look for 6 weeks on the car someone else built.
Yeah...Sounds like you need to get back to "blank slate" status. If one thing is out of whack, you may change 3-4 other things before you ever hit it.

Sounds like the ignition is garbage regardless.... I'd start with the distributor i posted, and then borrow a carb you know works well...and take it from there.