mshaw230, you are still not there because you don't know what the factory mechanical advance for that distributor should be. For example, your mechanical advance may not be fully coming in, and you are making up for it with initial advance. Or your mechanical advance may be coming in late. You really do need to dig up the specifications for that distributor and see where you are at for a base line and then go from there (dialing in the initial, and tinkering with the vacuum can for optimal vacuum advance). BTW, I am with stock49 here, you need a timing light and a vacuum gauge to do this right.

Last edited by mdonohue05; 07/10/18 12:24 PM.