Honestly, the comparative dimensions with the Adams and John Adams listed in post 15 of the the "first look at the John Adams" thread" (from the Fox papers that Frolick suggested as a source) are indeed about as good a starting point as I can find for an accurate reconstruction . But if the vault is open and/or you know of anything else...
Overdale made this model on the forum a few years back, I'd be curious as to your opinion of his Essex-based guesses for the deck vs your own research?
https://modelshipworld.com/topic/12369-frigate-boston-by-overdale-finished
I'm an admitted newbie, so that's where I stand for the moment.