In many years of looking over aircheck trade lists, the only Clark Race entry I've seen is a Beatles half hour he did on KDKA in 1964. It's poor audio quality, and it sounds like whoever taped it was more interested in recording the songs than anything Clark had to say.
California Aircheck used to offer a scoped piece of his afternoon drive show on a San Diego station in the '80s that featured a music-heavy soft rock format.