I recently installed some C-Record cranks that I think are late-80s to early 90s on a square spindle BB (Shimano UN72...a combo that has worked for years on this bike). Park's website recommends 312-324 in-lb for Campagnolo crank bolts for square spindle BB's, so that's what I used.
These cranks had already been on this bike (which I purchased from the previous owner), and the front derailleur appears to be where it needs to be. When I first screwed the cranks on, before torquing them tight, everything was spinning fine. After torquing them down the large outside chainring rubs the outside of the front derailleur cage when it is positioned over the smaller inner chainring. It only rubs when the right crankarm is between one o'clock and six o'clock. That made me wonder if the chainring was warped, or if I torqued things too tight and now the rings are not perfectly parallel to the bottom bracket?
Should I back off the torque or just adjust the derailleur so it's out of the way? Could I have trashed the cranks? I'm thinking about installing a triple anyway, but figured I'd get a little more out of these old cranks for awhile.