After installing the windsor in the Mav, I could never get her to run with the vacuum advance hooked up to my remanufactured duraspark II dizzy. I checked many things that others had suggested on other forums: static timing, total timing, vacuum canister for leaks, vacuum advance rate and spring adjustment, engine vacuum leaks, actual TDC #1 w.r.t. balancer degree indication, reluctor to pick-up air gap, dizzy grounding, dizzy wires continuity, ohmed out pick-up, ignitions system wiring check, rebuilt and wide-band tuned carb, I did it all. I finally figured it out, and decided I should post something for others who run into this problem as a possible solution- rotor phasing. My rotor was out of phase 16 degrees from my plug terminals on the cap. When the vacuum advance would actuate, it would go another 15 degrees, over half the distance to #8 terminal and cause a misfire. In all my searching, I never read of someone suggesting rotor phasing as possible cause for a vacuum advance issue like mine, a friend suggested it on a whim. I figured I would post so others searching for a solution may stumble upon a possible fix. I referenced the procedure below. I hope this helps someone. HTML: http://www.junkyardgenius.com/ignition/phasing/phasing01.html
