^A Separate Mercedes-Benz 300SLs and Austin-Healey 100s winners were declared in D Production at Cumberland. The Mercedes ran in a race with C Production, and the Austin-Healeys in a race with E Production.
^B D, E, and F Modified were classified together at Seafair; the combined class was won by Jack McAfee's FM Porsche 550. The highest-finishing DM car was Jack Graham's Aston Martin DB3S in 2nd.
^C E Modified were classified with D Modified at Seafair.
^D H Modified were classified with E Modified at Seafair.
^E D and E Modified were classified together for the 1-hour races at Thompson. The class was won by Masten Gregory in an EM Ferrari. D Modified was classed with C Modified in the sprint race.
^F Separate Overall and MG winners were declared in F and G Production at Watkins Glen.
^GMercedes-Benz 300 SLs were classified separately from others in D Production at Palm Springs.
