68-9 Dart Conv Front Transition Molding

Jim I do not think the 68 is different, I think there were 2 styles of transition pieces,(for the 67-69 years)
the cut-off style like Martin is searching for & the style that slides underneath a stainless trim piece along the top of the 1/4 glass area.

Dallas (mobodyman) has a 68 dart convert for parts-- it has the same transition piece that my 69 has & that Layson's reproduces.

in one of the links above the piece is for a 68.
Lawrence