I Just Bought A 1973 Superbeetle But I`m Having Trouble With The Way It`s Running For One It Will Run For A While But Then It Will Stop And It Takes Alot To Get It Going Again It Has A Mecanical Fuel Pump, Also When I Go To Chance Gear It Makes A Rumbling Noise And I`m Not Sure If It`s Chancing Gears Or Not.