This film's earliest documented telecast took place in Tucson Thursday 13 September 1956 on KDWI (Channel 9); it first aired in Boston Thursday 15 November 1956 on WBZ (Channel 4), in Indianapolis Monday 17 December 1956 on WISH (Channel 8), in Sacramento CA Monday 24 December 1956 on KCRA (Channel 3), in Scranton PA Wednesday 23 January 1957 on WARM (Channel 16), and in Springfield MA Friday 21 June 1957 on WWLP (Channel 22).
When Nails mentions the new racetrack in Inglewood, he is taking about Hollywood Park, which opened in June 1938, the same month this film was released. It closed in 2013 and is now the site of an NFL stadium.
That voice you hear calling the races at the horse track...It's Ronald Reagan with an uncredited role.