Inliners International Forums General Discussion Engines MLS head gasket on regular block?

I tried a MLS gasket without putting a mirror finish on the sealing surfaces and it failed. Make sure your machinist knows you plan to use a MLS gasket. And if you ever have to go back to a more conventional head gasket and you are running a lot of squeeze then you will probably have to re-cut the surfaces with a more aggressive surface finish. That is why I decided not to continue my R&D program with MLS - too much machining involved on my engines and prototype MLS gaskets were costing me $200 a piece.