Recently we talked about a fitment problem with the EGR valve sitting right up against the stock valve cover. An additional spacer plate would be needed if you wanted to be able to fit some other valve cover that might be slightly taller. You might even need more than one more spacer plate to fit some valve covers. Well at that time I didn't think the part was available new and probably hard to find used. Now I have found out the dealership can order the part for you. It is for the EGR with the triangular base and the part number is: 14031368 This goes on my 83 Blazer with a small block and a carb not fuel injection. I hope this my help someone else.