| This is a new master cylinder for 1979 Ford F350 Four wheel drive. Power brakes;  Front disc, rear drum 1.0625 inch Bore diameter  Forward outlet size:   7/16 - 24 Rearward outlet size:   3/8 - 24       Product Description
Dorman's Brake Master Cylinders are suitable for a broad spectrum of vehicle applications. We also offer a selective line of Master Cylinder Repair Kits and Master Cylinder replacement parts, available separately. 
Cylinder housing is constructed from high-quality cast iron or aluminum for long-lasting durabilityAll rubber components are of high-quality EPDM compound for resistance to glycol-based brake fluidDirect replacement for a proper fitManufactured to strict engineering quality standards, each Brake Master Cylinder meets S.A.E. specifications JBG  products are engineered and manufactured to meet original equipment fit and function specifications. Machined to exact tolerances Provides safe braking Meets Federal Motor Vehicle Safety Standards where applicable
 
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