...if I intend on building up a "vintage" frame?

I have my eye on a mid-eighties frame with 126mm rear/ 100mm fork spacings.

How modern can I expect to get as far a components go?
If there are any links ya'll might be able to refer me to in regards,
please...

I'm guessing that cold setting the frame to 130mm might be a strech.
What do you think? Does cold setting become a PITA, if removing the rear wheel?

Campy Super Record or C Record group rear...
What other recommendation might you have?

Thanks