Installing offenhauser intake

Yup. If the valley pan has a raised rib around the intake ports, it's a gasket, too. Lots of people say not to use them by themselves with an aluminum intake, but I never had aminutes trouble with any of mine. I always get copper coat in the can with the little bruch applicator and slob a good coat on both sides and slap it together. It won't leak. Use some high temp red silicone sealer on the intake bolts to keep oil from seapin up through the threads.