Isn't the last two digits of the hull ID on the transom the year? Is on all of mine, but don't know if that's an industry standard or not.
Oh and welcome! Looks like a good solid project there!
Ray
Yes, it's the standard now, but it started in 1969 and some manufacturers were slow getting it done...
Last two digit's are the model year unless there is a letter at the end, the letter, from what I have heard, is if the boat manufacturer has more than one plant....The letter designates which plant it came from...
Disclaimer;
That info. came from a crusty old boat builder after a whole bunch of Coors killing and could be folklore I don't know.....

GT
edit; Welcome to the site bro, you got a whole bunch of potential there