GUSAROO
IF IT's ANYWHERE UNDER 800 HP USE THE FELPRO O-RING (STEEL) FOR IRON HEADS AND THE COPPER O-RING FOR ALUMINUM HEADS.IF ITS SOME SERIOUS HP, USE THE MLS FROM COMETCO OR FROM FELPRO. IF YOU LIKE OLD SCHOOL LIKE ME!; USE A COPPER GASKET W/A RECIEVER GROOVE IN THE BLOCK & THE O-RING IN THE HEAD, YOU CAN DO IT THE OTHER WAY TO ! ITS JUST THE WAY I WAS TAUGHT,[GROOVE INTHE BLOCK/RING IN THE HEAD.]
I JUST PUT SEALENT AROUND THE THE WATERTPORTS ON BOTH SIDES,RUN DISTILLED WATER W/A SEALER AND I HAVENT HAD ANY LEAKS,[knock on titanium]
THERES LOTS OF WAYS TO SKIN THAT CAT!(or should i say ratt)
THIS IS JUST THE WAY IVE DONE IT.