Hi sparkybagnal, I would ask 2 questions - 1) why do you not want to get a tank made to fit by GBS, and 2) what engine are you running? Whilst I have tremendous respect for Shaft's experience and wisdom, will a high pressure pump at the rear of the car give adequate pressure in the fuel rail 2 metres away? A swirl pot in the engine bay is not that big a deal, but I have to admit that 2 fuel pumps is a pain in the R's.
Really like your radiator, and once again I hope it was made to compliment your engine,; good price too even at the current exchange rate