A pair of Pro-Am ’69 Corvettes, the #46 of Jody O’Donnell and Roberto Guerrero and the #42 of Al Unser Jr. and Peter Klutt head the field. Photo: Chuck AndersenLouis Casazza’s 1967 McKee MK VII leads Chris MacAllister’s Mirage through Turn 2 during the Group 5 and 7 qualifying session. Photo: Jim HatfieldArthur Porter in his ’84 Gebhardt JC853 GTP. Photo: Chuck AndersenChuck Jones turned up in his freshly restored ex-Joe Leonard 1972 Parnelli VPJ-1. Photo: Jim Hatfield