Sprayed the head gaskets with Copper Coat and installed the 906 heads. One of the gaskets was sprayed with some crappy old CC spray, compared to the nice new stuff I bought the next morning. I made note of this in my build journal in case there is a problem (leak) down the road. Incidentally realized I have to order 4 exhaust studs that were missing (the heads have been bagged since they were redone).