I use a Campy square taper road crank on the appropriate (111mm) Campy BB, with a Miche 1/8" ring in the outer position. I also have a 1mm spacer behind my cog. Rear hub is a Cance Creek 120mm, which I assume uses the typical chainline.

The resulting chainline is perfect, and the crankset looks a lot cleaner than with the ring on the inside.

YMMV.