I guess I,m just not as sharp as I used to be. Can't locate my manual and don't remember what the total mech advance should be on a 390. Seems like it should be around 37 or 38 deg. Right now i'm only getting 30. The distibutor and coil are stock with the addition of an "electronic module" in the dist. I'm running about 12 deg. initial. How much total advance should I have boys. Oh, by the way, I'm not using a vacumn advance. Thanks