WHEN THEY CHANGED TO THE 7.5 GALLON PETROL TANK THEY USED ONE SINGLE STRAP WHICH FITTED DIAGONALLY FROM 1974 ON. If fitting a new strap you will need a long 5/16" unf bolt (2-2.5") to attach to the boot floor as the replacement is not shaped. If just replacing your original strap a 1" bolt can be used.