After removing an 86-7 intake, has anyone ever seen some deterieration around the water passage ports (@ manifold to head)on the manifold? Just recieved a 2nd intake (been bead blasted- ebay sale) and there is some metal corroded away around the water ports, looks like it should be inside the gasket seal but getting close. Has anyone repaired and with what? TIG weld, Devcon, JBweld, etc. Rest of manifold is fine.