Gas Tank Straps Question

The tank I picked up on e-Bay a while ago. I don't remember from who... They are on there often, so it's not hard to find. The sump is from JEGS and that was about $60. THEN another $75 to have it professionally installed by a trusted radiator shop out here on Long Island. I finished it off with a few coats of Krylon hammer-tone spray paint. The paint gives the "hammered" effect when applied. It's sold as paint for outdoor metal furniture (so it *should* hold up well) and cost about $6-7 for a can big enough to do the tank and more....

Thanks for the bicycle inner tube suggestion. Good idea!

So how does that work? Does that replace the float system that normally goe in from the top of the tank? If so how do you hook up your gas gauge? Also it looks like the gas come out of the the back of the tank, if you had low tank and hit the brakes does it effect the fuel flow?