......OH MY LANTA!!!! now it all makes sense why there was numerous rolls of TP in the trunk of my 66 when I bought it! I figured the previous owner had some severe case of IBS or something. haahahahahaa!!!! I fixed mine via using a 67 coronet center cap from a hub cap, that says "dodge division" to cover the hole, and mounting a 13 gallon fuel cell in the trunk. feasible? probably not in most cases. Do I like it? yes. its functional and simple. :) So, anyone here need a standard chrome gas gap AND a matching locking cap for an early-a? also have the filler neck + tank as well.