Often, too often, less educated beginners believe that boats from the early days, like the 60's, are somehow better because they are supposedly "thicker". This has been
thoroughly debunked on this site and others where designers and surveyors check in. Repeat: there is no special 'magic' in a resin-rich hull with way too much matting in it, or like some lower end boats a chopper gun layup.
(sigh)
That said, some boats from those days, well designed by talented NA's, and then built to the higher standard that upper end builders could build to... are well regarded. And remain beautiful.
Enough that a restoration will pay off in admiration and smiles. And, that said, very few will sail as well as later designs, again from good NA's, will sail that were designed in the 70's and closer to the present.
If you just want to do a restoration on a free-to-you hull, there are better platforms out there.
Final caution: it costs more to rebuild a poor boat than one that originally had excellent scantlings.
Never forget the advice of the aged Knight to Indy: "Choose wisely"
Jon, that Kitiwake is one beautiful boat!