No start on rebuilt 360LA

furrystump said
Rotor phasing is change by one thing only from where the stacked tolerances put it during manufacturing and that is the vacuum advance mechanism. The vacuum advance actually moves the pick up location as a way to advance the timing. Using the advance plate was how I corrected my horrible phasing. Put the plate were it needed to be and pinned the plate there. Never planned on running the vac advance anyway.

I'm sorry but you are incorrect. With a magnetic trigger such as the Mopar factory breakerless ignitions, if you reverse the pickup wires IT WILL CHANGE the trigger point in relation to the rotor.
The magnetic pickup generates a positive going and a negative going spike sort of like a modified sine wave. "Let's say" the factory has the pos spike first and "let's say" the positive spike is what triggers the "box." When you reverse the pickup wires you reverse the position of the spikes........the positive spike is now after the neg and happens at a slightly different time--that is degrees of rotation in relation to the rotor position.

This is no different, than for example screwing with breaker points. If you change the points gap, you change the timng, and although it will change by a minor amount compared to the magnetic trigger, it WILL change rotor phasing by some amount. Another example is is you had dual points. "Let's say" you were out somewhere and the "firing" set of points failed/ burned so they were no longer making contact. Now the "closing" set would be acting as the only set of points.......and they would be opening at a different time than the normal firing set, and would also change rotor phasing. I have not tried this, but that problem might be enough change to cause problems.

I suspect that the term "rotor phasing" got "big" in the last few years with the various home/ DIY/ self installed electronic timing control and EFI systems where guys are still using a distributor, either for trigger as well, or as "only" spark distribution