I’ve got a harness bar to fit a ’71 Pantera. It’s still in the unopened bag Precision Pro-formance shipped it to me in. Black powdercoat. Measures 56 and 1/4 inches end-to-end and 55 and 3/8ths inches on mounting holes' center. New, never installed.
Here's the link to the part at the shop I bought it from:
$75 + $29 shipping (FedEx Ground, insured) — or pick it up in Santa Monica.
Shoot me an e-mail through the board or at: maddaddy (at) verizon (dot) net