I tried looking for one of those block off plates for my tj and the parts store said they don't exist. That a spot for an egr valve but jeep never placed and egr valve in any vehicle atleast that what the parts guy said. I say trace the hole out with paper and make it out of steel then when you install it put some high temp gasket maker around it that way it won't leak. If your messing the bolt take the manifold to a hardware store and match one up that will work