I don't have the same bike but am 5' 11" and my 58.5cm similar era steel framed roadie is a little on the small size for me. It took me a long time to find a period correct seatpost long enough and I'm running a long 130mm stem. I have 33" inside leg (longer than average) but not gibbon arms. Looks good though, to me.
In the shed:
Raleigh Team Pro - SB1988
Ribble 531C - "The Real Steel Special" - custom paint and Shimano stuff
GT Hardtail - Y2K frame plus hand-me-down parts
Specialized Transition Expert - modern aero TT rocket