Mopar Performance Distributor adjustable advance?
I used a solid plate from a lean burn and did away with the vacuum advance. You can get to those button allen heads with the distributor in the car. Just have to turn the engine. I set mine for a 20 degree retard for start up. One light spring . Once it fires it goes to 35 total. It starts at 15 btdc and idles at 35.
With a digital MSD the retard is built into the box so you can just lock the advance on the distributor and let the box do the start up retard. Worked for me. Mine idled at 1600 Rpm's and would spin at times to 8500 on shift depending on hook. rev limiter set at 9300.
Now a run a billet MSD distributor due to bearings instead of bushings. Did not make one difference in performance.