Tuning For Detonation

It is. Set the total number and move the distributor till it shows zero on the balancer with the strobe. What springs, the slotted one? I think I'd lose that one and use two light springs for this.

Yes, it does have a slotted spring. I also have found that according to my light, the timing mark on the cover is incorrect, so that's attributing to some of this too. When I have the timing set to what reads 15 on the marks on the engine, the timing light shows about 21.