A. Can-Am cars as raced after 1967 on slicks
B. World Championship for Makes sports cars raced after 1970 on slicks
C. Under 2.0 liter sports cars
D. Center seat Can-Am cars
E. SCCA ASR, BSR, CSR

Background and philosophy: These cars shall be prepared as they were during their competitive racing period.  Since racing technology progressed very rapidly during this period, there may be different specifications/configurations that are period correct.  These cars shall have been manufactured before December 31, 1979 (new models for the 1980 season are not eligible).  There were many one-off or very low production cars produced that ran in ASR, BSR, and CSR in the U.S., as well as other FIA categories around the world.  This list could never cover all of the possible makes and configurations so other cars not included on this list can be submitted for approval on a case-by-case basis.

Modifications:  These cars must be prepared to the configuration they were originally designed and constructed; otherwise, it is the responsibility of the competitor to provide documentation for any specification that does not align with common class configurations.  Since these cars mostly ran in open categories, there will be variations within a particular make and model that are period correct.  In all cases, they are expected to have period equipment and specifications.

Approved Tires:  Racing slicks and treaded tires, either molded or hand cut.  While exact size and aspect ratio are not specified, entrants must ensure that the tire choice is appropriate for the car and for the eligibility period.

Can-Am and ASR                                                 2.0L Sports Cars, BSR, CSR, Center Seat  Can-AM
BRM P167                                                                             Abarth 021,2000SP
Chapparal (Chevrolet)                                                             AMS 273, 1300
Delta Ti22                                                                               Bobsey SR
Ferrari 512/612/712                                                                Chevron B19, 21, 23, 26, 31, 36
Frissbee                                                                                   Lola T210/212, 290-298, 390,496
GRDS72                                                                                  Mallock U2
Lola T70/160-165 (7.4L Chevrolet)                                         March 73S
Lola T220/222/260/310 (8.1L Chevrolet)                                 Royale RP4, 4a, 4/6, 6, 10, 17
Lola T333CS, T530
March 707,717 (8.1L Chevrolet)
Matich SR-3                                                             World Championship for Makes through 1979
McLaren M6A, M6B (5.7L Chevrolet)                                 Alfa T33/3 & T33TT/3
McLaren M8B, M8C/M8E/M8F                                          Alpine A442-Renault
            (7.6L/8.1L Chevrolet)                                               Chevron B31
McLaren M12, M20                                                             Ferrari 312P & BP (3.0L)
McKee (7.2L Chevrolet)                                                       Ferrari 512S & M (5.0L)
Porsche 908 (3.0L, flat 8)                                                      Lola T280-286, 380 (3.0L)
Porsche 917PA, 917/10 & 30 (5.0L/5.4L flat 12)                  March 75S
TOJ SS-02                                                                           Matra-Simca MS670
UOP Shadow DN4A (8.1L Chevrolet)                                 Mirage M6, M8 (3.0L)
                                                                                             Porsche 908/03 (3.0L)
                                                                                             Porsche 917K, 917/20 (4.5/5.0L)
                                                                                             Porsche 936 (2.2L turbo)