The Real Don Steele show which was used on Once Upon a Time in Hollywood. See if you notice all the songs, voice-overs, and ads used!

The Once Upon a Time in Hollywood part begins at 
17:12 with Simon & Garfunkel - Mrs Robinson and the "Numero Uno" cologne ad straight after
24:24 Summer Blonde Advert
31:33 Los Bravos - Bring a Little Lovin' (and Pontiac ad, I feel like was used in the movie but can't remember?)
39:20 Suddenly / Heaven Sent Advert + High School Reunion
47:34 Dee Clark - Hey Little Girl
I thought I heard the Irwindale Raceway ad but can't find it again when speeding through, so timestamp it if you hear it. Could've been another aircheck though where I heard it.

These were all ripped from this very aircheck for the movie and soundtrack.

KHJ Los Angeles

The Real Don Steele - Once Upon a Time in Hollywood - May 25, 1968 Pt.1

A furry who is a railway dog and loves anything old.

The Real Don Steele - Once Upon a Time in Hollywood - May 25, 1968 Pt.1

Sunset & Vine