Tom asks: <One initial question; the brake cable guides are on the lower right side of the top tube, the opposite of what would suit a more modern Campy style sidepull. The reach is fairly short, about 50mm in a quick check on the front fork. There's no bridge for a rear center pull brake, although of course a binder bolt hanger could be fitted. What brakes would this frame most likely be designed for?>
First off, beautiful frame! Glad it wasn't my size...
Most of the sidepull brakes that I've seen from that timeframe are opposite of the Campy sidepulls, so your braze-ons are "normal." I don't know all the brands available at the time (Hillary?), but GB would be a good choice.
It's only a mist... in Arcata, CA
but most would call it rain.