Very cool. So it looks like the car was (possibly) ordered with the sports purpose tank with an under hood fill (which would be the gray plastic tank if I’m interpreting correctly).

Were all of the 110l tanks largely the same over these few years? I’m going to try to find a replica if so. The ones I’ve seen after searching had 1971 date stamps but maybe that is just from the particular mold? Is it also safe to assume the fender fill door opened to an empty or capped hole (rather than a different fender without the door)?

Thanks very much for everyone’s research and input