February 3, 1973

At the Daytona International Speedway in Daytona, Florida, the Daytona 24 Hours race is held.

• 2nd in GT +2000 class, 3rd overall: Dave Heinz, Dana English, and Bob McClure in the #5 Corvette.

March 24, 1973

In Sebring, Florida, the 12 Hours of Sebring race is held, round two of the Endurance Triple Crown.

• 3rd in IMSA GT +2500 class, 3rd overall: Ron Grable, John Greenwood, and Michael Brockman in the #50 Corvette.

April 15, 1973

At the Road Atlanta raceway in Gainsville, Georgia, the Trans-Am 500 race is held, part of the SCCA Trans-American Championship series.

• 3rd: J. Marshall Robbins in a Corvette.

April 21, 1973

At the Daytona International Speedway in Daytona, Florida, the three-hour Daytona Continental race is held.

• 2nd in GTO class, 2nd overall: Dave Heinz in the #5 Corvette.

June 9, 1973

In Le Mans, France, the 24 Hours of Le Mans race is held, over two days.

• 1st in GT 5000+ class: Henri Greder and Marie-Claude Beaumont in the #30 Corvette.
• 2nd in GT 5000+ class: Jean-Claude Aubriet and Depnic in the #69 Corvette.

June 16, 1973

At the Watkins Glen Grand Prix Course, in Watkins Glen, New York, the Trans-Am 500 race is held, part of the SCCA Trans-American Championship series.

• 3rd: John Greenwood and Bob Johnson in the #48 Corvette.

July 15, 1973

At the Sanair International raceway in St. Pie de Bagot, Quebec, the Molson Trans-Am race is held, part of the SCCA Trans-American Championship series.

• 3rd: J. Marshall Robbins and Jerry Thompson in a Corvette.

July 28, 1973

At the Road America raceway in Elkhart Lake, Wisconsin, the Road America Trans-Am race, part of the SCCA Trans-American series.

• 1st: John Greenwood in the #48 Corvette.

August 19, 1973

At the Edmonton International Speedway, in Edmonton, Alberta, Canada, the Edmonton Trans-Am race is held, part of the SCCA Trans-American Championship series.

• 1st: John Greenwood in the #48 Corvette.
• 3rd: Jerry Thompson and J. Marshall Robbins in a Corvette.

1973

At the Road Atlanta raceway in Braselton, Georgia, the Champion Spark Plug Road Racing Classic final races of the SCCA Club Racing series are held.

• 1st in B Production class: Bill Jobe in a Corvette.

August 10, 1974

In Talladega, Alabama, a 200-mile IMSA race is held.

• 1st in GTO class, 1st overall: Milt Minter in the #48 Corvette.

1974

At the Road Atlanta raceway in Braselton, Georgia, the Champion Spark Plug Road Racing Classic final races of the SCCA Club Racing series are held.

• 1st in A Production class: Marshall Robbins in a Corvette.
• 2nd in A Production class: Lou D'Amico in the #88 1969 Corvette L88 convertible.
• 1st in B Production class: Bill Jobe in a Corvette.

December 1, 1974

At the Daytona International Speedway in Daytona, Florida, the 250-mile IMSA GT finale race is held.

• 1st in GTO class, 1st overall: John Greenwood in the #75 Corvette.
• 3rd in GTO class, 3rd overall: Dave Heinz and Jerry Thompson in the #57 Corvette.

June 1, 1975

At the Pocono International Raceway in Pocono, Pennsylvania, Round 1 of the Purolator SCCA Trans-American Championship series is held.

• 1st: John Greenwood in a Corvette 427.
• 3rd: Milton Headley in a Corvette 427.

June 1, 1975

At the Seattle International Raceway, in Kent, Washington, Round 2 of the SCCA Trans-American Championship series is held.

• 2nd: Rich Sloma in a Corvette 427.
• 3rd: Rick Stark in a Corvette 427.

June 15, 1975

At the Portland International Raceway, in Portland, Oregon, Round 3 of the G.I. Joe's SCCA Trans-American Championship series is held.

• 1st: John Greenwood in a Corvette 427.
• 2nd: Rick Stark in a Corvette 427.
• 3rd: David Mock in a Corvette 427.

June 29, 1975

At the Nelson Ledges Road Course in Garrettsville, Ohio, Round 4 of the SCCA Trans-American Championship is held.

• 1st: John Greenwood in a Corvette 427.

July 12, 1975

At the Watkins Glen Grand Prix Circuit in Watkins Glen, New York, Round 5 of the SCCA Trans-American Championship is held.

• 1st in Trans-Am class: Babe Headley and Paul Misuriello in a Corvette 427.
• 2nd in Trans-Am class: John Orr and Bill Jobe in a Corvette 454.

July 26, 1975

At the Road America raceway in Elkhart Lake, Wisconsin, Round 6 of the SCCA Trans-American Championship series is held.

• 1st: Jerry Hansen in a Corvette 454.
• 2nd: Tim Startup in a Corvette 461.

September 7, 1975

At the Brainerd International Raceway in Brainerd, Minnesota, Round 7 of the Pepsi SCCA Trans-American Championship series is held.

• 1st: Jerry Hansen in a Corvette 454.

1975

End of the SCCA Trans-Am Series.

• 1st: John Greenwood in a Corvette.

1975

At the Road Atlanta raceway in Braselton, Georgia, the Champion Spark Plug Road Racing Classic final races of the SCCA Club Racing series are held.

• 1st in A Production class: Frank Fahey in a Corvette.

1975

At the Daytona International Raceway in Daytona, Florida, the Daytona 250 race is held, the final race of the IMSA Camel GT Challenge Series.

• 1st in GTO class, 1st overall: John Greenwood in the #76 Corvette.

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