Rear end gearing tech question

All I'm saying is you want the BOTTOM of you power band to be right under your foot at cruising speed. A delay to wind up feels sluggish. And a 25" tire a 3.91 hear @ 70 mph sucks. I don't know a lot about superchargers, but I don't think you'll be able to pull that motor that low to see the bottom of the torque curve on the dyno.