Here's one for electrical gurus. Help.

LOL I can't tell what's up there. There HAS been a few guys who seem to think that some of the pickups were actually reversed. If that might be the case, and a good idea, anyhow, check "rotor phasing." Google it Lots of info on it. Evidently SOME Mopar distributors were "off" in the distributor itself, IE the rotor/ pickup relationship. Someone was selling reluctors with modified keyways.

Modern problems............

That and you are (were) exactly correct.
This car came from the factory in 73 with the pickup wires backwards.
(Does it really matter?)
Note the brown with white tracer in the last pictures.
The "male" prong is supposed to go to one of the "forward/big end" sockets in the ECU plug.
This one went to the "rear/small end".
There are two sockets that are sort of further away from the front three.
Hey. I'm not an expert the black magic "PFM" of the ECU.
(I sent you a bad orange one years ago to do a postmortem on it).
My head is spinning.....FBO, HEI, FBO, HEI, FBO, HEI.
I've just been all over threads again trying to figure out what to do about my lack of good "old stock" Chrysler ECU's.
Plug and play and the warranty sounds nice on the FBO.
Trailbeast has some post where he talks about swapping the reluctor wires and phasing.
I put the wires back like they came in 73, backwards.
Hope that is OK.