Hi Kane,
Welcome to the site. Nice freebie. Quite a project though going by your description. Good luck with it. How about starting a rebuild thread in the Project Boats section to keep us updated on your progress.
As for what make/model she is... not sure. Looks familiar but I can't place her. Maybe a Shetland 535. Window configuration look the same, but the window shape on yours is more angular than the 535's unless yours is a very early example. Hull shape similar but not identical unless, again, yours is very early.
Any idea what year/how old she might be?