[J What?]

I am not sure about the original MK1 but I believe the MK2 was the same general design as the MK4, Dangerous! The fuel system was designed for expedient fuel filling , not safety. There was a vent hose going over the dash between the left hand sponson and the fuel filler neck. This was a mix of aluminum and or rubber hoses and hose clamps. The fuel cap was an accident waiting to happen. With the g force of 40 gallons of gasoline it doesn't suprise me that the system would fail as it did. IMHO, no extinguisher would put out the inferno that surely would have occured from that crash. You have to keep the gas in the tank. Better connectors, the least amount of hose, backflow preventers and a FUEL CELL. I can't stress the cell enough. The tire won't be an issue if you install it well. Cells usually are not the problem. It is the hoses getting torn from the cell that cause the leak. These things are not that expensive and if the manufacturers were to have a standard size made for their car it would cost a lot less. This picture is of a frontal impact. What would happen in a side impact where you use the fuel tank as the bumper?
Bill