Looks good
have you bought her or is it a project for others
There is one in Poole called two ways, owned by Jason Way and his Dad, I believe that one is fitted with a Volvo D3 and outdrive, which was a retro fit, they did not like the original set up of a large OBM.
Has the previous owner given you an idea of why he was tinkering with the prop? vibration, slow acceleration, fuel efficiency, or slow.
Charlie