Well, the RTV seems to have taken care of the header bolt leak. Bad news, I'm still getting a coolant seep on the drivers head gasket at the rear of the head at the bottom. Not too bad, but it is there. Doesnt do it until system has a bit of pressure on it. I'm running a 7 lb cap. I cleaned everything off real good when I changed the gaskets, hmmm, I dont know. I havent ran her much, maybe I need to run it more and let the heat get to them to seal them better.