So there are a number of auctions on eBay for fuel filler neck seals. They all show that they are compatible with the 1980 model only but even thought I have two '80's, I see no discernible difference between any of my fuel filler neck seals. I suspect that they all show the same error as we know how knowledgeable many eBay sellers are. Can we confirm that the filler neck seals are the same from 73-80?