Gas Cap

It is most likely a '71 only cap. My '71 Duster had the incorrect cap on it when I got it and was loose. I found out '71 a-bodies have a different filler neck than the other cars. I couldn't find a cap to fit so I put a '70 filler neck in the car.

'70's Dodge trucks are the same except they won't fit the '71. Been there tried that.

'71 only caps fetch big $ on ebay.

Chuck