Good choice Dave. I've long had a penchant for these tight-rhythm, organ/guitar driven instros. Always refreshing to pitch one of these into a listening session and there's a good number of the them on the reverse sides of many teenbeat 45s.
Another 3K tinged disc is a 1961 waxing Joe Norris on SOM. The top deck is 'Son Of Mississippi', a segregationist counterblast to the Mississippi Freedom Riders. The flip is 'Rock On Out Of This World' a shuffle paced rockabilly number with a drawled vocal and ringing guitar. Reminds me a bit of Little Donnie Bowshier's 'Rock And Roll Joys' But definitely no post '64 teenbeat vibe to it.
When Rick Morinini and Tony Rivas quit the Dovers after the 2nd single, Randy Busby came from Ernie & the Emperors to play drums. Randy was a guitarist and bassist (could play either instrument). I spoke to Randy once, around 20 years ago ( he has since passed away). As for the photo, not sure if that is Randy on bass, but it is definitely not Rick or Randy on drums.