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USAC (United States Auto Club) sancationed the California 500 race nine times from 1970 through 1978. The 1978 race was boycotted by car owners who were forming CART (Championship Auto Racing Teams). The California 500 ran under CART sanction in its final two years: 1979 and 1980. —Preceding unsigned comment added by Neighbors7 (talk • contribs) 19:54, 3 May 2010 (UTC)[reply]