Vacuum pressure on the 170

You got me, i was talking about vacuum on the manifold side. I have 18" hg, that is with the muffler bearings not spinning, I have around 10" hg on the timing side. The hose looks reasonable, haven't checked it really well, but what else should i check for problems.

If it's not the blinker fluid then I'm stumped! Others more well-versed than I will surely chime in.