I bought my 74 Pro as a bare frame. I built it up as close to stock as I could, given my personal preferences such as having barcons. My handlebars are 3ttt and are not correct. They were as close as I could come to period correct, though. I use 700C clincher rims, Mavic Module E. Some numbskull had drilled out the front fork for recessed brake mounting so I had to use a rear brake bolt and recessed nut on the front.

I wouldn't go with brifters, but anything short of that would be OK as long as it is reversible later if you decide to go all stock.