Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. NAPCO (Northwestern Auto Parts Company) was founded in 1918 and based in Minneapolis. During World War II, NAPCO helped the war effort by producing specialized mechanical parts and assemblies that were tested in war conditions. As early as 1942 NAPCO began building four-wheel drive assemblies to be fitted to Ford, GMC, Chevrolet and Studebaker vehicles however NAPCO is primarily associated with GMC and Chevrolet pickups. From 1942 to 1956 4x4 GMC and Chevrolet trucks could be ordered by the government and civilians with a NAPCO Power-Pak kit and the kit oculd be installed later. The retail price of Napco Power-Pak was $995.

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