Assuming that the wiring harness is good, you’re using an electronic-ignition coil and a known-good ECU and you’re running a hot wire to the positive side of the coil, it pretty much has to be the distributor pickup.
I ran across a ‘71 U-code four-door Chrysler in a local junkyard, back in the 80s and bought the engine. I don’t remember if it was a NY or a Newport. I sold the engine years ago.
They are different. ‘65-‘66 any Chrysler is what you need. I have one but it is buried somewhere. These folks sell reconditioned clocks: 1965 1966 Chrysler Clock Newport, 300, New Yorker, 300L
I don’t know if they’re still available but I bought replacements from the dealer last time I needed them. They’re the same as full-size vans, which were manufactured into the early 2000s.
It’s interesting that came off a ‘68. I assume it was a Canadian car. I had a US ‘68 New Yorker with factory cruise control and it was the newer style, on the turn signal stalk.
Rear defrost is just forced air- not heated. There is a thin duct in the center and a fan that takes in air from the interior and sends it to the duct, via a hose.
I have a black front and rear set in mint condition. I posted them for sale last fall and didn’t get a nibble. I was asking $600. What are you offering?