Oh boy I want to go fast

The 8-3/4 will hold a 500cid/RB in the 9's.

Keep it street leagal via working lights, horn, wiper, etc....
Have fun with the removal of everything else. You CAN lighten up the car very much.
Tub the rear if you want as well.

In this way, you can drive it anytime but yet be track worthy.