These are the cork valve cover gaskets we have seen these being used on 1964-1969 applications. These can be used in place of the Neoprene (rubber) gaskets sold in the shopping cart if you prefer cork over Neoprene. We have found the Neoprene will hold up better.these will fit from 1955-1977. These can not be used RA IV or modified valve trains. Check your valve cover bolts that they are 9/16" in length, if not the correct Zinc plated valve cover bolt set is sold in the shopping cart.