Original 1974 print advertisement for the Camel GT Challenge race at Ontatio Motor Speedway, featuring a Porsche 911.
 
The 1976 Camel GT Challenge season was the 6th season of the IMSA GT Championship auto racing series.  The series was for GTO and GTU class Grand tourer racing cars. It began on January 31, 1976, and ended on November 28, 1976, after fifteen rounds.
 
IMSA GT was a sports car racing series organized by International Motor Sports Association - races took place primarily in the United States and occasionally in Canada.  The series was founded in 1969 by John and Peggy Bishop, and Bill France, Sr.  
 
Racing began in 1971, and was originally aimed at two of FIA's stock car categories, running two classes each; the GT (Groups 3 and 4) and touring (Group 1 and 2) classes.  The first race was held at Virginia International Raceway; it was an unexpected success, with both the drivers and the handful of spectators who attended.
 
Dimensions: 8.5 inches wide by 10.5 inches high