I confess, I haven't gotten my hands on a Haynes manual yet, so I was hoping to get a quick answer here. I know the 240 red blocks have an extensive vacuum system to regulate all sorts of systems. I had to replace much of my original lines. Does the 850 have any such system? I quickly looked under the hood and didn't find an obvious looking lines. My original intent was to connect a vacuum gauge in my cabin (as I had done in my 240), to measure engine vacuum, which is usually a good indicator of fuel economy, etc. Is there a system like this I can tap into on my 850?