[289ACE]

Thanks for the input guys and it looks like 5/16 will probably be adequate and in stainless form that would be much easier to work with. Just to make sure, all of the dimensions stated above were ID correct? CobraEd, If I decide to go drag racing I guess I can always use one of the 3" frame tubes as a Fuel line. I'll just have to figure out how to attach it to the gas tank. Hmm, now that I think about it, why not drill a whole in the ends of the tube and run the fuel line through it? ;-)