For those who question the durability of Ma Mopar's steel and aluminum...

I noticed decades ago, the bolts and screws in early B bodies were so much better than the stuff starting around maybe '68. Better steel or were they dipped in something!?
Don't know about the bolts but I worked for Mopar dealers from '68 until '72. I did a lot of warranty work and the fit and finsih of most of the cars was lousy... worn out dies with zero maintenenance done to them. Water leaks and wind noise ruled... but I still love them.

The bad part of working for Dodge and Plymouth back then was you were forced to test drive 340's, 440's, 383's and Hemi's everday. I remember banging second gear in a yellow '72 Cuda and I snapped the driveshaft 200' from the driveway... pushed it back to the lot!