Have a 68 dart gts I decoded my fender tag but there was 2 unknown options. First one is top row "t6"and the second one is in second row "W9"they come back as unknown option. Please help
W9- Three Speed Wipers
T6- all I can get it to come back as is a paint code which wouldn't be correct for your GTS as its Racing Green Metallic with Racing Green Metallic upper doors and White/Green bucket seat Interior.
As far as the build sheet I don't think so. But I haven't ripped the car apart to really look. I'm sure the car was taken apart over the years. I got a folder full of paper work but no luck. Maybe somebody put it back??? I hope.