Currently in the search of red gm seat belts for the 66 F-85 to replace some frayed ones. From what I see there were used in 64,65,66,67. The are bench seat lap belts with the large plastic buckle covers and have the carriage symbol on them. Not worried about the covers as mine are getting replaced due to damage. Just need to be good drivers quality webbing with no frays.

Thanks
Magna