March 73A Chevrolet. John Cannon . Mallory Park Shellsport 5000 1976 action photo (a)

John Cannon's 'bitza' March sometimes described as a 73A, other times as a 721G and even a 751... Either way it only appeared at the opening round of the Shellsport 5000 series in 1977. 

Photo available 7x5 or 10x7 inches ( 175x125mm or 250x175mm)
 

Photo printed from original negative in a commercial photo lab.