Don't bother with gaskets,check the manifold mating surface for straightness with a sraight edge.If it's good ,use the high temp copper gasket maker,that's available at your local speedshop.If you find the surface uneven ,or the manifold warped,you have to take your manifolds to a machine shop to mill it straight.I never used gaskets on either BBF or BBC!Some people may not agree http://free.***boat.net/ubb/biggrin.gif,it's up to you to use or not use gaskets.