My dad and I are rebuilding the engine in our roadster. It is a 59AB 24 stud with Edmund Heads. The heads had some severe corrosion around the water ports in the center. We had them welded and a machine shop machined the head surfaces. Now we have a problem with piston clearance. It has been over 50 years since dad rebuilt the engine the first time and he doesn't remeber everything he did, but he did use 2 head gaskets to gain the extra clearance then. The gaskets we pulled off looked like they were glued together with some sort of shellac. Can anyone tell me the procedure for installing heads using 2 gaskets? What type gasket to use, etc. Or does any body know of a company that makes thicker head gaskets or spacers for this type of application? Since the heads have allready had some work done to them prior to this rebuild, we are very nervous about doing any grinding on them to gain the clearance needed.