I,m fitting an Aero style filler cap to the side of my rear tub & connecting it to the tank with the correct type fuel hose from CBS.
The tank sits above the height of the diff cage but is a good compromise for price etc.
the way i looked at it......... it would cost £20 for steel to make the tank, then the time , then the cost of a fuel sender etc......... but yet this tank cost me £29.99 delivered.......bargain if you ask me
cheers
andy