Hey guys...I got down to my block and found out I blew my head gasket between my #4 and #7 cylinders. Now that I am cleaning the gaskets off while my heads are at the machine shop getting looked over and possibly resurfaced, I have this plug by one of my bolt holes. On my passenger side I have it but not on my driver side. I just need to know if it is suppose to be in the head or block. Here is a picture