Crankshaft Diameter

I've just recieved my crank back. It had to be turned 20 thousands on both the mains and rod journals. I remember reading on this forum that the rear main is allready turned 20 thousands at the factory. (I believe to avoid installing our steel crank into a NA 3.8s ) If that is true then my rear main is turned down 40 thousands. I am running Heads Reworked 10% od pully Cat Back 2-1-2 Kooks Headers Front Mount Intercooler Raised Top MPII Blower MP Intake 85MM TB 42 LB Injectors 255LPH Pump w Regulator 76 MM C&L MAS NOS stage I 60HP Flip Chip Is that ok ? or should I look for a better crank.

If you had your crank turned 20/20 then you need a new crank. The factory manual warns against turning rear main past its already .010 offset. I think most machine shops dont know this about SC cranks and are probably responsible for snapped cranks!