[Steve]

What kind of gas cap belongs on the 1973 Challenger? There are few good photos on the Web and our restoration guide does not discuss it. We have a locking chrome cap now, but this is obviously not the original.

[dave-r]

There is some disagreement over this but this is what I think after lots of discussion on the subject when this message board was somewhere else.

A body coloured flush fitting cap was used for 1970-4. The flip-open chrome type was optional (standard on some models) 70/71 only. Replacement gas caps were flush fitting chrome plated so that the owners did not have to get them painted body colour.

[Hans]

As far as I can find in some books the 72/73/74 originally had the body coloured flush fitting caps. My 72 Ralley had one to but the previous owner installed a chrome flip-open. This looks better but it's not original.