A engine is not a clock. (with a cam like this in the motor and a auto trans),,,it ends up so close to dead on accurate that running any kind of a mechanical timing curve is pretty much a waste of time.
Works really well when combined with vacuum advance controlled by ported vacuum. (about 8 to 12deg at cruise and a limit of about 15deg max)
Give an engine what it wants and it does something really surprising. It runs real well.
This engine will run the best with the locked out timing. You may not like. But the engine will.