Theres actually one more 1967 Rally wheel that was used , the DG . I have found 2 sets of these on Impalas, one was a 1967 Caprice 4 door loaded car with 4 piston discs. The Corvette guys have the history on why its a DG instead of a DC and the month or two that it was used. If I remember right it had to do the the DC stamp going bad so they used the DG for a short time. Same exact wheel.

I think ? what Nick is saying about 6 1/2 inch wheels Don is for 14 inch 14x6 C wheels for Station Wagons but is measuring to the outside , same with his 7 1/2 comment . Wheels are measured BETWEEN the beads , not outside edges.

Yes DC was used to 1969 but superceded by YS code 15x6.