That should be an easy build. 1 1/8" external cup Aheadset (not sure where the 1" came from) + ITA BB + 27.2 seatpost + braze on front derailleur + standard short reach center mount brakes. Very common specs for a new groupset. Nice find, beautiful frame and it's a Colnago which adds 2mph to your speed because it looks so fecking good. Post pics when you're done.