How do I determine the amount of ignition advance to use with a certain aftermarket cam and aftermarket distributor? I aquired a 350 SBC with a Mallory Unilite distributor, Edelbrock Performer intake, Edelbrock 1406 carb, and an aftermarket cam of unknown make. I do have the cam specs though, which were torn off the box the cam came in by the previous owner. I guess my question is this: If I posted the cam specs, could someone out there give me a starting point? I think a stock set up runs about 8 degrees of advance, but I would think that the aftermarket cam would change all that.