1973 / Can-Am Challenge Cup
Jun
10
V Labatt´s Blue Trophy
Mosport Park
Jul
8
IV CanAm Road Atlanta
Road Atlanta Motorsports Center
Jul
22
V CanAm Watkins Glen
Watkins Glen International
Aug
12
XI Buckeye Cup
Mid-Ohio Sports Car Course
Aug
26
VII CanAm Road America
Road America
Sep
16
VII Klondike Trial 200
Edmonton International Speedway
Oct
14
VIII Monterey Castrol Grand Prix
Laguna Seca Raceway
Oct
29
XVI L.A.Times Grand Prix
Riverside International Raceway