We know that CNC porting guarantees consistency, but CNC machining the block? All blocks at Indy Cylinder Heads are CNC machined. Everything is located from dowel positions. This MP mega block is bored, stroke clearanced, and lightened. This particular engine received a partial lightening, which means the motor mounts were left in place (the owner did not want to run a motor plate). A full race lightening can remove up to 40 pounds of cast iron. Consider this exercise the Atkins diet of block preparation.