Thanks to all for the replys..

I had the manifolds surfaced when I restored the car, so I know they "were" flat.. Car is still in Oregon ( I now live in Florida). Drove it when on vacation back "home" and developed an exhaust leak. Tried to just loosen manifold and pull out the gasket, then retighten the manifold.. Lets just say it didn't work.. Hated to leave my car "broken" when I flew back to Florida..

I thought about not using gaskets when assembled but chose to use them.. Will try some remflex next time "home"... Need to get it running to load on transport to Florida...

Rick