Hello all, new here and I got a couple of questions related to head gaskets. My LLY has been up in Nashville at Shacklett’s for going on a year getting the billet mains and block work done. Therefore I have kind of taken a break from duramax for that long. They are punching it .020 and line honing with a torque plate, also decking the block .005. Question is what am I gonna need head gasket wise? Grade D or can I run the wavestopper I got ? Thanks in advance