Versailles rear ends are nice if you can find them, 9" with disc brakes. I picked mine up in the salvage yard for $125 ready to bolt in. It came with a Trac Loc too! 67-70 Mustang rear ends are all interchangeable. If you happen to have any of those years its worth knowing. 65-73 Bronco rear ends are the same width as a versailles rear but take more to get bolted under a Mustang.
66 Coupe, Supercharged 408 Clevor, Viper T56, Cobra IRS
66 Coupe, Supercharged 03 Cobra drivetrain and suspension (project)
03 Viper, Supercharged