Sure grip 7 1/4 strenght?
Had the same,3.23 SG in a 67 Dart 100,000 + miles still in it when I sold the car. The car was a automatic. A 4 speed,,, It may break parts. CharlieS drag races his .
X2
I ran 235/60/14 on my last Duster, the tires would spin, not hook.
The rear end never gave me any issues.
It had about every engine combo in it.
6 / 904 stock 70K miles.
Ex wife locked the 225 engine up on a 120 mph run.
Put a 318/727 in it, she ran that motor until it smoked bad.
Dumped in another 69 318 and a 3-speed standard trans, clutches became an issue.
Put a serious high reving 318 .060 over 4-speed in it.
I got the car back in a divorce, she held the throttle wide open on the motor trying to blow it.
The rear end still worked after 10 years of abuse. I had a spare just in case but did not need it.
The key was it spun the tires not hooked up.