Another great find well done, have to agree about not resetting a bonded frame, if i had the frame i would consider bar end shifters along with best groupset at best price i could find and the widest tyres that would fit.
Other solution may be to contact a wheel builder and see if they can provide a 126mm rear wheel that may accept a 7 or greater cassette.
As for handlebars engraved cenilli and if you can find one a cenilli stem, Just wait and make sure of lenght of stem required before buying one.
You must have a really great fleet now aladdins cave somewhere?
Thank you for your (level headed) comments....l am the first to admit that l can get blown away by the prospect of another wonderful bicycle.
If possible l would like Mavic hubs and rims similar to those on my 1970s Faggin andI will be seeing my much used but l hope not abused bicycle wizard who has the great name Thierry Tran Duc. He has built and re-built wheels for me in the past and gets just as excited as l do about vintage bikes. As far as the groupset goes, at present l have an open mind except that l want Shimano. The headset for the frame is a Shimano 600 arabesque, so thats my start point .
I like your Cinelli suggestion probably because at least two of my bikes have those bars and stems, and l bet l could tell you in a blindfold test which ones they are....they fit me perfectly.
Oh yes and my Aladdins bike cave is where l feel at home even though at the moment it is a bit draughty....the weather in the Lot being a touch blustery and wet....