When I ran the connecting rod reconditioning department at a big machine shop in Nashville, we stored crankshafts in a steel rack, hanging by the flywheel flange, but it was mostly for space saving- - - - -50 or more crankshafts in stock at a time, including Cummins Diesel shafts about 5 feet long. I think the old myth about a shaft bending if stored flat is a bunch of hogwash!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!