Its interesting you found out that it was a Nova. I havent seen mine 'in the flesh' yet , but I thought it was very similar to yours. Im stumped now.
Here is a pic of the Novamarine 9 metre, which looks a similar hull to yours. The deck layout is different but has maybe changed since 1991.
The ivecos should have been marinised by Iveco as they sell them marinised. Mine were marinised by IV as i have got the engine numbers.
The P22 was an early Osbourne (that makes 3 builders of the Pac to all you spotters!) and was in california at i think the sale in Long Beach a couple of weeks ago.
Im still finding out about that drive. Neville.