16-17 CHEVY SILVERADO 1500 MOUNT BL

Complete conversion kit engineered for 1973 to 1980 Ford, Dodge, and GM 3/4 ton vehicles equipped with NP203 transfer cases converting full-time four wheel drive to part-time operation. Includes Mile Marker 423 manual locking hubs. This kit delivers a complete heavy-duty solution for converting factory full-time New Process 203 transfer cases into efficient part-time four wheel drive systems. Designed for 1973 to 1980 Ford, Dodge, and GM 3/4 ton trucks equipped with the NP203 transfer case and Dana 44HD front axles, this kit eliminates constant front axle engagement while preserving drivetrain strength and reliability. By disengaging the front drivetrain during normal driving, this system reduces unnecessary component wear, lowers parasitic drag, and can improve fuel economy while maintaining full off-road capability when engaged. Engineered with precision-machined components and backed by decades of drivetrain expertise, this kit offers professional installers and restoration builders a proven modernization solution for classic heavy-duty trucks.