<A little backstory for those who don't know, Bruce and Terry apparently wanted "bring the fun back" to west coast music or something like that in the early '70s and so they went about overdubbing old Jan & Dean records and released those on the United Artists label. >
A quick qualifier on this. The first two singles for UA... GONNA HUSTLE YOU/Summertime (1972) and SUMMER MEANS FUN/Gonna Hustle You (1973) were Dean Torrence projects through his deal with UA. Bruce and Terry came in to record new BG vocals with Dean for GONNA HUSTLE YOU and SUMMER MEANS FUN. They were released under the name LEGENDARY MASKED SURFERS,
Yes, IIRC California Music recorded other material. A. o. a great version (imo) of "Why do fools fall in love". During one of those sessions that Brian collaborated with them, Brian went to one of Elvis' sessions and tried some Karate on him