RDV4ROUBAIX said:.... If you want to hang a couple G's worth of modern grouppo on a older frame, better to start with a frame that will accept it in the first place.
Exactly right. Cold setting sort of works. Sort of. Leave it as-is and go retro.
As for some of the frightening comments about old parts, they are far simpler than modern equipment. I find less maintenance issues as a result.