Dave, A quality metal head gasket is upto just about anything you want to thro at it with most big power cars using them but the Oring adds that much more reliability in massive boost cars tuned to the limit like you plan for yours. When using an Oring on a metal head gasket it can take days to settle needing to be retensioned a few times before startup and then retension after its been run.Many 1000+hp cars run the metal gasket alone without trouble but at about $130 to Oring it wont add much to a major buildup and does seem to help if you overheat your engine and leaking after overheating seems to be the only weakness of metal gaskets.