| Modified | Amateur | Attendance | Notes | |
|---|---|---|---|---|
| March 27 | Jerry Watson | Pat Duke | 3829 | |
| April 17 | Don Fleming | Pat Duke | 7297 | |
| April 24 | Nick Rampling | R. Sosek? | 5121 | |
| May 1 | Jack Cook | Joe McQueen | 5402 | |
| May 8 | Jack Cook | Jordan Richardson | 7203 | |
| May 15 | Jack Cook | B. Lyons | 6324 | |
| May 22 | Bill Burr | John Clapham | ||
| May 29 | Vic Parsons | Pat Duke | 5482 | |
| June 5 | Norm Lelliott | Pat Duke | 5956 | |
| June 12 | Bill Burr | G. Hooper | 6582 | |
| June 19 | Ray Elliott - USAC Midget | 14368 | ||
| June 26 | Jack Cook | ? | 7568 | |
| July 4 | Bill Burr | Pat Duke | 5907 | 50 Laps |