ATS Manifold
I had the same question about where to drill and tap for the pyrometer sensor. It sounds like you have already drilled the ATS so any suggestions are a moot point. I purchased my ATS manifold from Piers and his suggestion was -
"The ATS manifolds "used" to be predrilled & tapped, but haven't been for some now. They do have 2 bosses on the manifold, right beside the flange that the turbo bolts too, that were put there for this purpose. The front one is the one I usually drill and tap for the pyro, I've found the front three cyl. run hotter than the back 3 & I want to know what's the hottest egt's I'm hitting are. . "
I know what you mean about the bracket! I cut the original and drilled it to accept a flat piece of steel we bent and made to fit. This is the best picture I have at the moment. If you would like a better picture, let me know and I'll get one.