You have vertical dropouts and what might look like a 130 spread in the rear triangle. Without any subtlety, you can install any modern road gruppo on that frame pretty much without reservation, if it's a 130 spread. Being 853, it might not be easy to cold set the frame to 130 mm; I'd consult a really good shop with a lot of cold-setting experience. The reason is that 853 is a lot different from 531 or Cyclex steels, that can be cold set. It won't be vintage, but with 853 tubing that frame is not vintage. Traditional design (horizontal top tube), yes, but not vintage.

You'll get a great bike out of it.