You might wanna try using Permatex "The Right Stuff" instead of gaskets. It'll make a great seal even if there's a misalignment problem. It comes in a pressurized can and makes a nice even bead. It's expensive, but compares with using purchased gaskets. Sometimes the angles between the heads and the intake can be slightly off depending on the heads, milling, decking, etc. It'll drive you nuts trying to get a good seal.