I'm looking at building up an early 90's frame with a Sram Rival Grouppo, but I'm not 100% on the logistics of it all. The spacing is fine at 130mm and the front derailleur is a clamp-on so there should be no issues with that. Also reagular side-pull calipers should fit no problem. Threaded headset and quill stem is fine. The frame has cable tops on the downtube.
My first concern is the rear derailleur. Will a Sram rear derailleur work with campagnolo drop-outs/derailleur hanger?
My second concern in the bottom bracket. Will a Sram italian threaded external bottom bracket work with the italian bottom bracket on such a bike?
The frame I'm look at is Colnago Olympic Master if that helps.