On our trips to the auto parts store, a complete Fel-Pro engine gasket set was our biggest purchase. Be sure you install the head gaskets correctly on the engine with the end marked "front" at the front of the engine so that the water passages are properly gasketed. The head gaskets we used were blue on one side and gray on the other. With the gaskets on the right way, you’ll have the gray side up on one side of the engine and the blue side up on the other. Make sure to check with your head manufacturer to make sure the gaskets used are compatible with aluminum heads.