Slant six engine EGR valve blank off plate?

I got a couple of the block off plates from a guy on eBay (there used to be 2-3 guys selling them)
I also bought a pair of rust free bed sides from him and since I drove down to Georgia from Illinois for those he threw a couple of block offs in with the deal.
I also cleaned out the carbon from the threads in the hole in the intake below one of the barrels on my super 6 intake manifold and put in a 3/8 npt pipe plug with plenty of red loctite for good measure besides.