Tommy - normally that's right, but with the Kuwahara frame he's got (it's an old 9 speed I think, I have one that looks near identical) the rear spacing is 126mm, and it's cheaper/easier to put a 120mm rear hub in there and squeeze the stays in. That gives you a roughly 42mm chainline, but it's best to get a BB that you can dial in/out so that you can fine tune it.
Tommy - normally that's right, but with the Kuwahara frame he's got (it's an old 9 speed I think, I have one that looks near identical) the rear spacing is 126mm, and it's cheaper/easier to put a 120mm rear hub in there and squeeze the stays in. That gives you a roughly 42mm chainline, but it's best to get a BB that you can dial in/out so that you can fine tune it.