Lots to do to this. I'm 190cm and plan is to closely replicate my road bike position as best as I can. I plan to build it up to ride 50-60Km rides in under 2 hours on flattish terrain.
No one locally deals with minivelos or has very old or limited experience.
Campag running gear is a current consideration but first thing: wheels in 451 and tyres sourcing cheaply as possible and stem lengthening advice and best way to accommodate a 60t chain ring when the largest that fits with hollowtech2 is a 53 before hitting the chain stay.