Chevrolet Pickup Stepside Drag Racing Racelegal 12-16-2011

Great looking four wheel drive step side truck drag racing on the 1/8 mile. An all-new clean sheet redesign of General Motor's (GM) Chevrolet and GMC brand C/K-Series pickups d├ębuted in 1972 for the 1973 model year. Development of the new third generation trucks began in 1968, four years prior to production in 1972, with vehicle components undergoing simulated testing on computers, before the first prototype pickups were even built for real world testing.[3] The redesign was revolutionary in appearance at the time, particularly the cab, departing from typical American pickup truck designs of the era. As a result, the third generation quickly became known as the "rounded-line" generation; although some people refer to them as "square bodys", given that the trucks appear square-like by more modern standards.[4][5] GM's design engineers fashioned the "rounded-line" exterior in an effort to improve aerodynamics and fuel efficiency, using wind tunnel technology to help them sculpt the body.[6] Third generation design traits include "double-wall" construction, sleek sculpted body work, flared secondary beltline and a aerodynamic cab which featured rounded doors cutting high into the roof and steeply raked windshield featuring an available hidden radio antenna embedded into the glass.[4][7][8] There were two types of pickup boxes to choose from. The first type, called "Fleetside" by Chevrolet and "Wideside" by GMC, was a "double-wall" constructed full width pickup box and featured a flared secondary beltline to complement the cab in addition to new wraparound tail lamps. Both steel and wood floors were available. The second type, called "Stepside" by Chevrolet and "Fenderside" by GMC, was a narrow width pickup box featuring steps and exposed fenders with standalone tail lamps. Initially, only wood floors were available.[9] The wheelbase length was extended to 117.5 in (2985 mm) for the short wheelbase pickups, and 131.5 in (3340 mm) for the long wheelbase pickups. A new dual rear wheel option called "Big Dooley" was introduced on 1-ton pickups, along with a new Crew Cab option on the 164.5 in (4,178 mm) wheelbase.[10] Crew Cabs were available in two versions: a "3+3" which seated up to six occupants and "bonus cab" which deleted the rear seat and added rear lockable storage in its place. The fuel tank was moved from the cab to the outside of the frame, and a dual tank option was available which brought fuel capacity to 40 US gallons. 1980 was the first year that a cassette tape could be purchased, along with a CB radio.[11] The rounded-line generation ultimately ran for a lengthy 15 model years (1973--1987) with the exception of the Crew-Cab, Blazer, Jimmy, and Suburban versions, which continued up until the 1991 model year.

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