o ring
I have a sbc block i oringed with s/s wire years ago, Its a blower motor, i took it out of the dragster and put in my daily driver. I have the s/s wire and some normal fel pro head gaskets on there, i just made sure the wire ring hit the same spot on the gasket. I put a 1000 miles on it and no water leak! I know this does not answer your question but something to think about.