What's this ? A 12 bolt center section or complete rear ended ? Strange makes a 12 bolt center section for the ford 9 inch.
You will find that the Strange 12 bolt center section will not accept a series III carrier which you will need for the gear you will need.
8300 rpm for a mile is doable with Cup state of the art engine hardware but you would be better served running a lower rpm unless you have the $$$ to chase the engine package.
We went 307 MPH @ 7300 RPM with a 12 bolt using a hard to get today 2.13:1 ring & pinion. The car weighed 5200 lbs.
One other thing, your 29.4" tire has about 92" of roll out... sitting still.
Adding verbiage to make the site think its a new post, I hate that...