That statement "Cometic head gaskets are realistically impossible to blow is dead nuts WRONG.So with excessive blow by, it's got no where to go. So it' not blowing these head gaskets because they are Cometic which realistically are impossible to blow. They are just seeping past. So I'll find out tomorrow for sure. Hoping to go to Dallas this weekend and ride the bike, so that'll tell too..
Cometic makes, and supplies a lot of the engine manufacturers, including S&S, head gaskets.