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1959 Chevy Apache 3600 fleetside napco 4x4 3/4 Ton 1969 chevy 350 corvette motor camelback heads regular cab frame off restoration. Please call 607-280-4359 for more information. Napco History NAPCO" stands for the "Northwestern Auto Parts Company" of Minneapolis, MN., though their production facility was actually located in Plymouth, MN. I've been told that the abandoned old plant still stands with a weathered sign posted, sadly advertising times gone by. NAPCO had been in business since 1918, and during W.W.II, they focused all their attention on projects commissioned by prime contractors to the United States government. Mainly, this meant the production of specialized automotive parts and assemblies that could be tested on the largest proving ground in the world. After the war, the military's priorities changed, and NAPCO re-directed its vast engineering and manufacturing experience to the production of goods for private industry, which included the production of the famous NAPCO Powr-Pak 4x4 Conversion. I've heard countless times that NAPCO was bought out or had gone out of business in the early 1960's. This is just not true In the 1950s the Northwestern Auto Parts Company became a publicly traded stock company and changed its name to NAPCO Industries, reflecting it's change of focus from wholesale supplier to manufacturer. In addition to manufacturing, the company began a program in earnest of tracking the availability of blue prints and vendors and prices of all the equipment requested by its world wide customers. That computerized system has evolved to become today's model for the industry. The company also adopted the quality standards required of manufacturers serving the US Defense Department. The date that NAPCO started to produce 4x4 conversion units is a little foggy. I have heard stories of GM trucks being converted as early as late 1949, but the earliest documentable truck that I have ever heard of is a 1951 Chevy 3/4 ton owned by Butch Gehrig of Odell, OR. Until October 28th of 1954, when Chevrolet introduced the '55 1st Series, all the conversions were done on 3/4 ton and larger trucks. The '54 and earlier Advance Design 1/2 ton models were not suitable for a NAPCO conversion due to the enclosed drive shaft design. GMC and Chevrolet conversions were by far the most popular, though conversions were available for Ford, Studebaker and other manufacturers. Though the date of the first NAPCO 4x4 conversion is unknown, we do know that in July and August of 1954, NAPCO was very busy pushing its proven 4x4 conversion on truck upfitters and GMC dealers across the country. Upfitters were companies that installed upgrades and accessories like winches, auxiliary transmissions, tandem drive axles, dump bodies and hydrovac systems on stock factory trucks. The NAPCO slogan proudly stated: "Now you can have a standard Chevrolet four wheel drive pickup featuring the traction power of a tank, or, at the flip of a finger, a smoother riding, high speed, over the road truck. Aptly named the Mountain Goat, this full sized pickup will literally leap up mountains, as well as carry you through deep mud, sand, or snow." Apparently NAPCO reached an agreement with both GMC and Chevrolet to supply them with the Powr-Pak conversion kits, and GMCbegan to produce 4x4 trucks on the factory assembly line (using NAPCO components) starting in 1956, with Chevrolet following suite in 1957. By the end of 1957 both GMC and Chevrolet trucks could be ordered from the factory with the NAPCO Powr-Pak conversion. The two offered identical systems other than the availability of a V-8 and an automatic transmission on the GMC trucks. The Chevy could only be ordered with the 235ci six cylinder and a four speed manual (although there was nothing stopping an owner from ordering whatever he or she wanted in a 2 wheel drive truck and then having a NAPCO Powr-Pak "upfitted" by the dealer). Some features of this early "shift-on-the-fly" 4x4 were the unchanged turning radius, a full engine torque P.T.O. option, a rubber mounted transfer case for long, silent operation, greater ease of steering, and a guarantee of no damage to the Chevrolet or GMC frame during the three hour installation. Yes, only four holes to drill and no torch cutting! In a matter of hours, you could go from a two wheel drive to four wheel drive and the NAPCO Powr-Pak could be transferred from one GM truck to another. If a dealer had a truck in stock that he wanted to convert to four wheel drive by using the NAPCO Powr-Pak, he could order the Powr-Pak four wheel drive package. Soon, a wooden crate, 80 inches long, 30 inches wide and 26 inches deep would show up on his lo
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