Head gasket recommendations for magnum

Found the numbers on top of the piston. H814CP Which is Speed pro hypereutectic pistons. Looked it up and its for a magnum engine 1992 to 99 so i believe the cam is whats causing the problem. I frkn missplaced the cam card too when i moved into my new house so im gonna have a long day looking for that. This blows, should of degreed the cam but got to much in a rush for that trip. It ran fine all the way up there too but i do want to correct this problem so i dont have any future problems.