Another M1 Vs Airgap

I know this question has been asked a million times, but........I have an m1 single plane on my engine with a four hole spacer, do you think the airgap would be better. The engine 406 stroker smallblock, 288/292 501/513 roller cam, 9-1 comp. all forged internals, msd ignition, paxton supercharger running 12lbs boost with water/methanol injection. The only reason I was thinking of switching is I need to replace intake gaskets and it would be a good time. Also I shift at 6000, I know it might make power beyondf that but I feel safer shifhting there