Project 31 information required

[Freddie100]

We have recently purchased a Project 31 made by Princess Yachts back in the mid 70s, it is indeed a lovely old boat and we love it to to bits and great fun as a long term project, had the engines overhauled which run well, have some work to do inside mainly cosmetic and when done it will be a fine craft.
The 12 volt electrics are a bit naff, I have yet to sort the domestic water system and a few other bits to make it totally usable.
I ask if anyone has any sales brochures or maybe an owners manual or any information sheets at all on Project 31s in order for me to understand the workings of it a little better
If not is there a Project 31 owner out there that I could pick their brains and answer any questions I have just to help out ???

Greatly appreciated to anyone who can help

Freddie 100