Tuck describes his setup here:
http://www.tuckandpatti.com/tuck_tone.htmlBasically...
Recording: 1953 Gibson L-5CES with Ernie Ball roundwound strings (.011, .014, .018 plain, .028, .046, .056 except "Heaven Down Here:" .012, .015, .020) and medium-high action (12/64 inch from 12th fret to top of sixth string; 8/64 from 12th fret to top of first string), bone nut and Tune-O-Matic bridge with metal inserts. Single Bartolini 1HCX3 pickup (neck position, angled 23/64 inch from pickup to sixth string, 10/64 inch from pickup to first string).
Live: Same except: 1949 L-5, Bartolini 1CTA pickup.