Hypothetical is correct. I've researched this enough to tell you any gains on gasket matching is minimal at best. Nothing you would ever see off a dyno and I seriously doubt any concern with 'wearing seals'.It seems like it might create some unanticipated backpressure and start wearing seals. That's just hypothetical.. Another option I'm considering is just adapting the cobra 96-98 intake manifold right into the C-heads. Any opinions?