Setting vacuum advance

I'm currently going thru this exact subject on my Mopar's. I started with the 74 440ci Ramcharger as it's only getting 6.6mpg, next I'll work on the Duster 360.





I also started a thread on RamchargerCentral to document my steps and before/after mileage for tuning the timing/vacuum advance
Vacuum Advance Timing for Maximum Efficiency