Hey man, I see you have already "mounted" your engine, but you should have enough room for your exhaust to clear. I just got my second 5.0L Z on the road and used pretty much the same parts that you are using on both and didnt have to modify my Patriot headers. My engine is offset just a bit to the passenger side and both the oil filter and the driver side header clear the steering shaft with a "fingers clearance" or more. Im sure you already tried, but I recomend you shift your engine and trans a bit to clear, but it looks like you might have to raise the engine a bit though. Just a thought
Its looking really good so far though!