Need help with 8388 ready to run distributor

Keep that 8388, it's a good distributor. You just need to fine tune it to work for your combo. What do you have for a motor combo? I'm running an 8388 on a 68 318 with stock cam, holley 670 and headers. Initial is 15 degrees, 21 degree bushing, 2 light silver springs on 91 octane. Vacuum is routed to the ported vacuum on the side of the metering block. No detonation, not too much vacuum. Good power and decent economy