I finally tracked down a really nice factory cast-iron SBC intake manifold that’s correct for a Q-jet. It would be correct for a 327 ci engine. My purchase included a gasket and also a stainless metal plate. The metal plate has 2 holes that line up with the exhaust crossover holes. The stainless steel plate holes do not connect. How important is it to use this stainless steel plate? Is it supposed to be positioned above, or below the paper gasket? The picture below is a copy of what a vendor on eBay says about what he’s selling.
