Question For The Experts
If you have a dual ballast, this is from MyMopar
Notice one side of the dual is same as the single. The "U" at the left end is your index, and that is why it is there.........to identify which half is which
On a side note, the coil / resistor wiring for the original Mopar ignition DID NOT CHANGE from points wiring. This means (I realize you have Mallory) that if the Mopar breakerless quits, and you have a points distributor, you can yank the Mopar breakerless, stuff the points distro in there, and hook it back up to the coil. Unplug the ECU and be on your way..........assuming the ballast/ wiring/ coil is OK