Stock Replacement Gasket Replaces Cast Steering Box Cover To Housing Picture In 1959-60 Steering Box Rebuild Parts Diagram In Catalog As Number 1 This stock replacement steering box cover gasket is manufactured by GM or by one of its authorized suppliers for use as a factory replacement part. You will find the fit, finish and function meets all GM specifications. Using stock replacement parts from the El Camino Store, such as this steering box cover gasket, is a sound investment in the restoration or repair of your vehicle.