cj has it correct ... I also had a 66' jazz, dots/binding, but sold it back in '72 ... anyhow, the 60's Classic is 7.25, which your 66 should be too, and also vintage fret wire and reverse tuners as your 66' ... you can get aftermarket oval tuners if you want to go that far that are direct fit also ... they are going around $500 used, and fit and finish is very good ... some are changing to the CS 60's pups, but for that money you have a little room to play with and fine tune ... I have one, and have just about convinced myself that I didn't make a $6-8000 mistake back in '72 ... well, just about ... but as they say, if I knew then what I know now ...
BTW, the Roadworn Jazz is the same neck dimensions, with slightly thinner body and a more rolled fretboard edge ... so that is probably even closer to home ... if you want to go that way too