That being the case you could try two different approaches, first I would mark the position of the IP and then loosen its bolts and rotate/clock it towards or away from the block, you may be able to get by it then. You might also try a Dremel type tool with a 1/8" ball carbide cutter so that you can get into it at less than a straight shot from the rear. There appears to be about 1/4" of material at the rear of the recess. Good Luck!