I searched but did not find the answer. I just installed new ARP cylinder head studs and went to fit the head gasket. It will go over the studs but will not lay flat. When I push down on half of it it pooches up at the other half. When I try to push it down there then the pooch goes to the other end. It is a Lucas gasket that is recommended for the 87mm cylinder/piston kit. It is a composite type with a silicone applied. I very lightly scraped at one of the holes at the end as that seems to be where the problem is and it appears to be metal in the middle so I don't think I can enlarge the holes to allow it to go down. It appears if I put the head down on it, it would cause a wrinkle. Any suggestions? Bruce