For your info
After 6 months I finally installed the boost gauge. These are the sort of boost levels you can expect with a centrifugal supercharger. The Mustang has a 5200rpm electronic rev limiter.
3500rpms - 1 psi boost
4000rpms - 3 psi boost
4500rpms - 6 psi boost
5000rpms - 8 psi boost
5200rpms - 9 psi boost
If I were to have installed a turbo, I should have a full boost level of 9 psi at 3000rpms all the way to redline. Imagine the same setup on the P5. You probably wouldn't see any boost until about 4500rpms and not see peak boost until redline. And you just lost low end torque because of the power needed to drive the supercharger. It worked great on the Mustang. It had plenty of torque but needed a boost on top end. Just the opposite of our P5. We need a torque boost throughout the entire power band. I'll be using a Garret GT-25 variable nozzle turbo on my P5 when the project gets rolling. That thing should spool VERY quick.