yup, thats how I did it this time. The first time I used only silicone on the china wall and a little rtv around the water ports. it worked fine, but there was a giant oil leak at the back of the manifold. I re did it two days ago with metal gaskets and the cork, but the manifold must be ever so slightly warped and it had the vacuum leak. This time I got the thickest fel-pros I could find with cork and allll black silicone. It is a stock 1971 340 TQ manifold