Well, Sam, this must have been our week. As I did the same thing the other day. I am aware of the minimal clearance and have had mine raised (obviously not enough) so I am usually extremely careful, but this one blindsided me.
I have an '89 Spirit. Different floor plan, different plumbing layout, but similar problems.
You may or may not be able to use 14''
tires. It really depends on the clearance you have. If your tire is completely centered in the wheel well, then you can. Mine wasn't so I had to wait to get an new
axle before I put on the 14's. What you can do (what I did initially) is upgrade your
tires from the 175/13s to a 185/13s. I had to order mine from Goodyear and they were quite a bit more. A much more substantial tire that adds a little height. Worth the cost? I dunno, probably not.
You don't need to get a new
axle like I did to raise it. You can take it and have it raised and have 14'' tires put on for less money than a new
axle.
Gray water tank ....