Great thank you. That bung king one looks perfect because I like how it welds in plus it's vented too which I need.Speedway has one. I used it on an aluminum beer keg gas tank on a T bucket. https://www.speedwaymotors.com/Spee...MIhvye2ePD6gIViI7ICh1Q_ALrEAQYAiABEgJ9YvD_BwE I like the BungKing cap http://www.bungking.com/filler-cap-and-bung-vented/ I used the steel version on a narrowed Sportster tank a couple of years ago.
Man, I have been missing out with Bung Kings. That site is excellent.