[750hp]

I completely agree. Every rpm over 5252 that you develop peak torque at, by it's very calculation means that you will make more power. If you have the efficiency of intake/cam/head design to flow the numbers to support the rpm, and you design the supporting components in the motor to hang together for the required distance, you're on the way.

Gearing then comes into play to make sure you never have to dip too low in the rpm range to worry about torque...

An interesting example of torque "making" horsepower - my motor on the Superflow 901 engine dyno made peak torque of 705lb/ft at 6000rpm. This gave us 805hp. We put 2 degrees more timing into it, which pushed peak torque to 6400rpm. It still made exactly 705lb/ft torque, but by moving it only another 400rpm up the rev range gave us 859hp...