Dunno for drag race only, but I used the Camaro 1LE rubber bushings in mine and it drives nice and is capable of 1.5x 60' times. If you want better than that, I can't help you at this point.
I used the 1LE F body bushings at all 8 mounting points in the rear suspension. No more wheel hop problems at all. They are about $10@ from GM and definitely worth it!