I had mets machine in mansfield ohio cut grooves in my head for fire rings. I told them I was wanting to run a .020 over thickness headgasket, gave them the gasket I was going to use. what do they do along with alot of other head work cut the groves for a stock thickness hg bored .020 over. My block is not bored so now what do I do. Mets isn't going to buy me a new head and I just had this head ported and polished bigger exhaust valves cut in and fireringed, so as you can imagine I just put a lot of money in it. Do you think it will hold a hg being as the fire rings are .020 wider than they should be. Its cut for 4.370 id .105 rings