I found that even on my born frame, with a stupidly stiff back end, my cranks wouldnt hit if you rode normally, but when i put the power down i could flex the back of the frame and hit the cylinder with the crank.
I expect he'd have the same issue considering they run that close.
I'd advise selling your burns and get new cranks. Burns are sought after, and to be honest you could be left with money in your pocket if you sell them and buy some cranks with more offset