Normal end play is .006" maximum. Are you working with new or used main bearings? A new bearing might get you closer to specification if the thrust face of the crankshaft isn't worn badly. Sometimes a wrong clutch adjustment will cause a constant pressure on the flywheel and crankshaft which wears out the thrust bearing and the crankshaft flange. Too much end play will sometimes cause an intermittent knock that's hard to find.
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!