As an update, I was able to finally get the bolt out after getting and angled drill attachment, drill a hole into the screw and then using an extractor bolt. One I did that and got the screw out, it was smooth sailing get the valve cover off and back on with flexing the coolant pipe. Now I am not sure if I have the fuel injectors seated all the way back in. Is there a way to tell. I did not put new Orings on as I would have needed a lot more work to get the whole rail out to do that.