the center of the dash (Fuel, Amp, Temp, Oil) with silver/grey faces. Third Series: 1956(late)-71 Includes the following years and model numbers: Late 1956 C-4-PW; 1957 W300; 1958-9 W300M; 1960-71 WM300; Additional Distinguishing Features: (3) square stake pockets on each side with stamped bed sides. Looking at the bed sides from the rear, the top of the bed is flat, with a rounded edge. Group of 4 gauges in the center of the dash (Fuel, Amp, Temp, Oil) with black faces. NP420 Synchronized Transmission also used. Third Series EXPORT: 1957-78 M601 open cab, flat-faced cowl models and M615 ambulance Four Wheel Drive light-duty pickup trucks and Town Wagons W100 and W200 (1957 - 1980) The first light-duty styled Power Wagons came out in 1957 with the introduction of the four-wheel-drive versions of the Dodge C Series pickups and Town Wagons, Beginning in 1957, -ton 2WDs were D100s and 4WDs were W100s, -ton 2WD and 4WD were the D200 and W200 respectively. These trucks featured the same styled cabs and front sheet metal and the cargo boxes used on the 2WD models. Their 4WD mechanical components—axles, transfer cases, and transmissions—were sourced from outside manufacturers. Chrysler Corporation owned the New Process Gear Company (competitors generally used Spicer (Dana) transfer cases and Borg-Warner or in-house transmissions). In 1963, a new 225 cubic-inch slant six replaced the 251 cubic-inch six used in 1961 & 1962 W100 & W200 Power Wagon Trucks. The Power Wagon W300 continued to use the 251 cubic-inch L-6 engine. The new 225 cubic-inch engine (the 225-2) was able to power the med. duty trucks due to improvements including roller timing chains, bi-metal connecting rod bearings, stellite-faced exhaust valves, roto caps on exhaust valves, and polyacrylic valve stem seals. A big-block 383 V8 engine became an option starting in 1967. From 1961 to 1971 the body was called the "Sweptline," then transitioned to a more modern body image from 1972 through 1980 with varied grilles and paint schemes. The Town Wagon Power Wagon retained the C Series body style until it was discontinued in 1966. In 1975 the 4-wheel drive became full-time with a 2-speed transfer case; this was changed back to part-time 4-wheel drive in 1980 due to the energy crisis. A huge boost in sales followed the 1974 release of the extended "Club Cab," popular with families and camper hauling. The 4-door crew cab was far less common and