Hi Steve,
The plan is to build it exactly the same as 1964, but the OEM fuel tank is not up to a new Fuel cell compliance so the OEM tank is there for show, but does also provide structural support to the rear body.
The auxiliary tank will be used as the race fuel cell, I only hope it will be big enough as its only 42 ltrs. I will need to add some baffles inside for the fuel pick up and fuel foam along with a tank breather.
I will try and get an electric stewart warner fuel pump (another rare part) and plumb it in too