Which single seater auto-racing formula did 1977 Can-Am season series used
1977 Can-Am season:  This series used Formula 5000 Lola T332s with fenders added. Formula 5000: Formula 5000 (or F5000) was an open wheel, single seater auto-racing formula that ran in different series in various regions around the world from 1968 to 1982.
Formula 5000