I don't know if you have enough room under your Burb but a late model Chevy/GMC poly tank may work. It'll have the high pressure pump, return line fitting and it's not heavy like a metal tank.
My '56 Burb body is mounted on a '00 GMC Sierra chassis, using engine, transmission, all the oem parts including the gas tank. I had to remove the tank yesterday to replace the fuel pump which is held on with two straps. Fairly easy task.
I can take pics of the tank if you want.
