Rich:
First, be sure that your vac gauge is working properly. 20" vac is a bit too high, even for the mildest cam.6-8 degrees initial sounds fine. I believe that it should be 10 with L79, and 8 with L75. Remove the rotor and check the operation of the advance weights. Move them by hand and check for binding, etc.
Joe
First, be sure that your vac gauge is working properly. 20" vac is a bit too high, even for the mildest cam.6-8 degrees initial sounds fine. I believe that it should be 10 with L79, and 8 with L75. Remove the rotor and check the operation of the advance weights. Move them by hand and check for binding, etc.
Joe