Has anyone looked at the idea of a boat fuel tank? They come in every deminsion possible. (well . . . almost) This is what I plan to do if I decide to modify my all orginal 65 C10. But I really don't want to change anything on this truck. Anyway, check this link for some examples . . .

http://store.easternmarineoutlet.com/index.cfm?fuseaction=catalog.catalog&categoryID=483

Just a thought.
Les

If it ain't broke, take it apart anyway, just to see how it works.