Hyper 8 - Cool Fuel
Most Seven type cars have the fuel linings in the propshaft tunnel.
The propshaft tunnel is not a very good place to run fuel, since it is a rather hot place. Heat from the engine and gearbox are blown through the propshaft tunnel and you will end up with pumping heated fuel to the engine.
On the Hyper 8 the fuel lines are mounted on the outside of the chassis. Not a lot of heat there.
Since the body is fully detachable the fuel lines are easily accessible for inspection.