Yes, it is a re-power, maybe
Generally the engines were Universals, M25, M25XP, M30 and up. The factory, however, was known to "take what was around" during crunch time to finish a boat. They made almost 1,000 in just a few years. If you know the hull (sail) # I can do some further investigation. We do, also, have a member who personally re-powered with a Perkins and is quite knowledgeable about that engine (and happy with it).