I think it all depends on the frame design. Track crankarms will not clear chainstays on certain or most non-track frames. Simply using a longer b/b will give you the crankarm clearance but will throw the chainline way out and end up with a wide Q-factor which you don't want.
My track frame setup is a bit narrower compared to my road bike setup with 130mm dropout. In both bikes, the crankarms clear the stays by about 7mm...

George