AMD Bumpers
Usually the cause of the chrome "cracking" when you tighten the bolts down is either bent/misadjusted mounting brackets that stress the bumper as the bolts are tightened.
Last 69 Dart I restored, I was into 2 bumpers for over $1000.00. With these new AMD bumpers, you can buy 2, shipped to your house for less than $600.00.
No brainer for me!
George