1967 Barracuda 4 Speed 273 back fire issue

the link I gave has the bulkhead connector listed in it. I agree with 2 darts though the YO engine lighting harness is affordable and a correct direct replacement for less than 200. I think I paid 145 for mine on special. I rebuilt my dash harness.

Bulkhead Connectors
66-74 A Body bulkhead connector $70.00