Suspension, sway bars, wheel&tire upgrades, help!!!

The car should go straight under acceleration, period.. the problem is most likely in the rear of the car, The rear end MUST be straight with the centerline of the chassis. A sway bar and/or bigger torsion bars are a waste of time if the rear is out of square. LOTS of drag cars run 10s, and over 120 mph with 6 cyl torsion bars and NO swaybar.. Beefing up the chassis is a good idea, but it AINT your problem