Here is a set of brand new (NOS) Offenhauser intake gaskets for the Plymouth Dodge Chrysler Mopar 318 cu. in. engines. I think they also work on the 277 and 301 engines from the same era, be sure to check. These are the good grey "armstrong" type material and do an excellent job of sealing on all aluminum (like Offy, Edelbrock and Weiand) and other intake manifolds. The set consists of the two side rail gaskets only, see pic. You would use a bead of RTV on the front and rear of the valley. .. .. .. key: these engines are found in belvedere savoy fury Chrysler Dodge royal and others..... .. .. hot rat rod gasser offy weiand edelbrock industrial ..