U.S. built 47-54 GMC 450, and 470 series 3 ton ,and 3 1/2 ton trucks have a different brake system, than the 300, and 350 series 1 1/2, and 2 ton trucks. Wheel cylinders are not even close to being the same. NAPA 15315, Raybestos WC15315.
Spanky Hardy Collector Of Fine Old G.M. COE Trucks & Antique Holmes Wreckers
