I agree with MegaDart.
The 30-40 percent is for E85, for methanol it should be sized for double the flow of gasoline, IMO. The pump must be designed for methanol (alky) for material/seal compatibility.

At 13.3 CR, I would start with an NGK -9 heat range. But you might be able to run one step hotter -8.

And if the fuel/air mixture is setup right, and you use a lean out valve in the pits, put proper heat in the water, etc, then you won't have oil problems and 20-40 passes should be fine. Especially with a vacuum pump pulling moisture out of the crankcase. Check the oil a few times when you first start running alky to make sure.

And run a top end lube in the alcohol.

IMO, you will see the most ET gain in the hot weather (85-90 degrees F), and less in the cooler weather (50-70 F).