I gotta new bob drake tank for the 51 ford shoebox. My question is... do i need to seal or not. I couldn't find any definitive answer when I search here, shoboxford or google. Anyone have any exp with these tanks? I did call and talk to some one over at bob drakes. He said it would be easier to by ethanol free gas. Not sure where the hell i am gunna find ethanol free gas in the suburbs of detroit. If need to seal, what should i use that will take the abuse of ethanol. A lot of what I have read so far, states they have had problems with the sealers breaking down and gumming things up. My other question, what is a good 5 or 6 screw/hole sending unit to use with my stock gauge?