Re: Custom Fuel Tank Home › Forum › Ask A Member › Custom Fuel Tank › Re: Custom Fuel Tank jw-in-dixieReplies: 371Topics: 23 June 4, 2018 at 1:17 am #77368 The Feds aside, if you can tolerate reduced capacity, what about reshaping the end of a std 6 gal steel tank? Welding steel is less expensive than Al.