M1 SP vs Air Gap

If you got a light combo that has good heads and that'll be running over 4200 most of the way down the track I think the M1 will go quicker, If the M1 doesn't make more top end power you probably don't have either enough cam, compression or head on the car to max the RPM out, but fact of business an M1 (modeled after the old Strip Dominator) will flow more air.
Most heavier dual purpose cars with automatics will like the RPM or Air gap better because higher average torque will out ET higher top end power because (if you think about it ) you utilizing more of the powerband going dow nthe track, particularly with steet stall type converters where the shift recovery flash RPM is below 4000.

I thought about keeping hte RPM I already had for my Rocky but with my particular combo I want to Take off some upper bottom torque without killing top end power....so I went with the M1.....it really depends on your App.