Just measured the crown on the 3.7/4.7 piston and it is 7mm thick.
Also it's the type of piston you use that dictates how much is machined off the crank counterweights. The counterweights don't hit the block but the bottom of the piston and type of piston skirt will hit the counterweights iirc.
Last edited by Stroker; 31-03-2016 at 06:26 AM.