I'd pop for one of the American to Euro adapters and as Sheldon Brown says
"Be the first kid on your block to put a Dura-Ace crankset into your Schwinn Varsity!"
http://harriscyclery.net/itemdetails.cfm?ID=1335
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This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.