Originally Posted by
Ex Pres
Chainline is set by the crank/BB and the frame would not affect this - excepting some oddball [no-dish] frames and the like. You're putting a road bike crank into a road bike. Clearance should almost never be an issue with an external-type crankset, as there are not multiple spindle lengths to choose from. The spindle is part of the crank itself.
I've put external style cranks on a couple of bikes that were from the square taper days. Admittedly a small sample of 2, but ran into zero issues - besides needing new tools.
Since I couldn't find any of the specs on either crankset/BB, I was concerned that a change in the distance between chain rings and frame center might also be indicative of a change in their orientation (chainline) with the cogs. I was ultimately concerned about compatibility between the new crankset/BB and vintage frame. But you made several key points...road bike crank into road bike, limited available spindle lengths, and you've done the conversion yourself.
Ex Pres....That was exactly the insight that I was looking for....Many thanks.