Rear end gearing tech question

Dana said

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.

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But peak torque isn't the bottom of the powerband, depending on the build torque is fairly flat. Theres a good 2500-3000 usable rpms under peak torque and 500 or so over peak hp making your engines powerband 4000-5000 usable rpms. Really the engine is at peak power at peak hp and the rpms above peak torque is stronger (more power) than at or below peak torque.
So as long your engine don't lug at speed its fine, which for me is anything over 2000 rpm and the OP probably lot lower even though with his gear choice will never know.