I need new tires for my Charger, been running 29" Hoosier QTP.

Ive been looking at the Hoosier 30x9" bias-ply slicks. I cant fit 29x9" Mickey Thompson slicks because they are so wide side-side. Also I run 4.56 gears, so a 28" diam. tire wont work.

The Hoosier bias-ply slicks come in two different compounds, where one is softer (D5), the other firmer (D7), so which of the tires would be better?

My car weighs race ready 3891lbs. Cal-Tracks, AFCO DA chocks front/rear, etc...

I can/will not run a radial tire because the track i run at does not have the grip needed for a radial tire...

Thanks!
/Tom