Sniper
Canadian Rust Bucket
Filler necks are pretty much the same size with the older 1/4 turn gas caps. Sometimes it would nice to finish off the install for looks or even help keep the fuel fumes on the outside when filling up. A cheap solution is a gasket that is intended for the toilet. The gasket between the toilet bowl and water tank is just the right size. Usually made from sponge foam, or rubber, it fits snug, has a flat edge on one side and tapered on the other.