FYI FORD MustangSteve's Ford Mustang Forum / stress cracks on rear quarter window area

**Posted by mjacobs** 5/29/2017 9:45 AM

66 Mustang Coupe has cracking around C-Pillar, rear roof pillar bottom rear corner at quarter window on both sides of car.
I think this is a common stress fracture on these cars.
What is the correct way to repair? I have install sub-frame connectors.

**Posted by True74yamaha** 10/05/2017 6:48 PM

V out the crack Give it a nice taper. Then weld a reinforcement on the under side. Then weld up the crack that you prepped.

**Posted by Huskinhano** 2/26/2018 10:37 AM

These cars are very flexible. I’m in the process of installing torque boxes in front. Anything you can do to stiffen the unibody up will help.