67-69 Bcuda flip top gas cap on Dusters..............

I would think since they are an above surface device it would be pretty tough to do much of anything else with them.
I just noticed the Bcuda have a recess around the cap, thus they do not protrude as one would if simply mounted on a stock Duster. If the entire cap w/
a portion of the recessed qtr were cut out of a Bcuda it should look fairly nice.