I bought an adaptor to mount a 69 cuda flip top gas cap on my duster from another member here. Finally got around to putting it on. Which way is it supposed to open. Mine would only go on opening from the front. That seems backwards to me. Anybody care to offer up a pic of a factory installation? I replaced a factory chrome gas cap and painted the flip cap body color (black). Not too sure if I like it now its on the car. But it was so dingy and dreary out today, I'll need to see it in the sunlight before I pass judgement. I'll post pics when I can get it out in the sun.