Yes, I make them for all the LS stuff I'm doing now. His block should already be o-ringed for the copper head gasket any way, and is better than the MLS gasket he is thinking of using. A fire ring or hoop is good if he wants to step up and do that also, it's common for the LS and diesel performance stuff also. It's even better if you cut receiver grooves in the head. Since he mentioned he had a CNC, it shouldn't be any problem for him...
