what is largest cam for 340 with factory 10.5 flattops????????

What is the largest cam you have put in a 340 that still had the stock forged 10.5:1 pistons? I know these engines have close tolerances when it comes to camshafts. I have heard the limit on lift is low .500" and I know duration will also effect clearances. At the moment I dont have the tools too check what max lift could be, reason I am asking.