That small voice upstairs keeps sayin coil or ECU so please keep us updated. the dragging test would for sure confirm or elim the pickup (elim the pickup means it could be the wiring/ecu in that system, anything other than the pickup) IF the system was totally dead but with it like it is now that skews everything (to some extent). I just had a coil be pretty much the same (FBO black coil) & towed home & the coil sparked. Changed it & all good in the 'hood. Had an ECU do similar & it was the ECU

I did your dragging test, if I did it correctly it did have spark.I cleaned all the bulkhead connections several different ECU s, several coils checked all the grounds nothing. I think I'll just get the MSD distributor and coil and just run the three wire system.

Yes you did it correctly & my bad I missed your info that you had replaced the coil and ECU several times.

Robert, I did have spark.I when I did your test, so that would show pickup good?.

that test takes the pickup out of the picture cuz you are directly triggering the ECU with the dragging as opposed to the pickup electronically triggering the ECU so with it sparking that points to the pickup as the culprit but what skews things is that the offender is acting up part time (from the heat) & that changes rapidly with electrical items (can come and go fast/randomly) so the coil or the ECU or the pickup could be what is bad but k.i.s.s. since we have changed the coil and ECU several times (at least!) logically as you noted it is time to replace the pickup (or dist). Short version: got another OE dist (or pickup from one) to toss in real quick

nvm.

Was the chrysler lean burn system in effect in 75? or did that come later? just wondering if that could be the issue if this motor in fact has it installed.

I believe '76 on some 440/400 engines