Ok so I'm trying to dial in optimum ignition timing for my 340 setup, 9.5:1 compression, 360 j heads, 2.02, 1.60 valves, comp 268xe cam, edelbrock rpm intake, 670 holley, 6al mad and Mopar perf distributor. I recently had a little trouble out of my vaccum advance and while diagnosing it I...