How do you guys keep gas from spilling? 66' Dart

......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.