What gear, converter and HP are you running with the Charger?

Do you know when you are bending the spring on launch at the drag strip on a prepped track with slicks or?

Has the car ever been hit (accident with frame damage) in the back or any where?

Have you had the car on a 4 wheel alignment rack to confirm everything on the frame wise is straight and true?

Just for comparison the 72 RR above has a 508" sixpack with stage VI heads. Hyd flat tappet cam, 9.5" TC and a 2:94 gear in the 8 3/4" Obviously the XHD springs out back and currently there is NO pinion snubber, (factory or adjustable) or traction device (cal track or slapper bars) in the car.

So far I havent bent a "new" Mexican XHD leaf spring on this car to date. These springs have been on since the end of March this year and put probably close to 500 miles on it now in this configuration.