Abstract: A vehicle body panel is utilized to convert the large, rounded rear window of 1984-1989 Chevrolet Corvettes to a flat rear deck configuration. The replacement body panel is preferably formed from a molded fiberglass material and includes a generally horizontal rear deck portion having generally vertical side walls. Rear wheel wells are formed in the side walls and a rear roof portion extends upwardly from the deck. A generally trapezoidal planar rear window is provided in a back wall of the rear roof portion. Apertured flanges are provided on a back end on rear sidewall bottom edges of the body panel for securement to the original vehicle. A U-shaped strip is formed on a forward edge of the rear roof portion and forms a channel for weatherstripping which forms a seat for engagement with top and side portions of the original vehicle body panels. The original rear valance panel of the vehicle, including the original brake and signal lights, are secured to the rear end of the replacement panel.