Turning a 340 crank, How much is to much?

Can get Clevite bearings in, mains in .010,.020,.030,.040 under and rods in .010,.020,.030,.040,.050,.060 under. Personaly i dont like to go any more than .010/.010 on a stick car and .020/.020 on an auto car. JMO, I know people that have gone .030/.030 and even .030/.040 w no problems.