Nils - I sent one of my blocks to Millennium Technologies to have them Nikasil coat it and then had custom pistons made by CP Carrillo. the block was slightly overboard to 85 from stock of 84.5, resulting in displacement going from 4172 cubic CM to 4222 cubic CM (not a big deal). Then had CP Carrillo design new pistons that lowered compression to 9.0:1 form stock 9.8:1. Doing the Nikasil coating process enables me to never have to worry about any special compatibility coating issues with Alusil (namely pistons and rings). CP Carrillo also provided custom rings and wrist pins as well. Rods were supplied by Integrated Engineering.