Willcox Corvette, Inc. - Corvette Repair & Install Help Willcox Corvette provides corvette repair and install help through posts, tech videos, and tech pictures. On the 1978 Pace cars and the 1979 Cars, the seat back carpet was not bound. However, it didn’t stop GM from making them to small on any year car. 1973-1974 Corvette Radio Wiring Schematic. 1973 – 1974 Radio Wiring schematic.