>>194118080s is when mass produced ones started getting good, I'd look for a frame from late 80s/90s from a small boutique builder like Serotta and put modern components on it
I've done that to a Serotta CDA, Ciocc Mockba, Colnago Master...
they make fun rides but don't believe the shit that they are magical or better than some cheapo generic carbon frame.
IMO Tange is shit. Modern mass production steel are shit.
Columbus and Reynolds tubing is something to look for.
You should be able to fit 25s in most vintage of this era, I remember running 28mms in the Ciocc I had no problem.