Before the MLS gaskets came about, everyone used copper head gaskets and O-rings in either the block or head deck surface. Copper gaskets are a PITA. I have a set of solid copper gaskets ($$$) potentially going on a 9-1 race engine. Do I need to O ring the deck? the SCE rep said to use indian head brown sealer cement & that would suffice & you'd think he would know but I'm concerned, what do YOU think? Thank you. I don't know...never seen a motor run copper gaskets without O-rings. I sure wouldn't run copper gaskets if I didn't absolutely have to. They can be a PITA to seal up (water and oil). I'm not a fan of having to slather silicone all over a head gasket to make it seal up. The newer style copper gaskets w/ the embedded silicone rings around the holes may be better. The last copper gaskets I used were just pure copper.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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