On the new boat, i have Panther exhaust logs and risers on my 460. I need to remove the right side to replace the starter and cant find the necessary gaskets to replace the old one. I DID find the exhaust manifold-cylinder head gasket by Fel-Pro BUT i cannot find the manifold-riser gasket where the riser attaches. Will the Hardin brand gaskets for the same engine model interchange and where is a good online place to buy them? Thanks a lot...