I was leaning towards using this system too as a result of
the previous discussions in here. But, after looking into it
for awhile, I decided against it. The block itself is not
very big, but the way the lines come into it means that you
need a fairly large area to install it. There was no way
I could fit it into my rear trunk and have it serviceable.
Considered some other locations, like under the bed, or in a
closet floor, but finally decided that I liked the simplicity
of the original water supply runs. Ended up grafting on a PEX
duplicate of the original lines just past the stock regulator
and drain valve cluster.
I'm not saying it can't be done. I'm just chiming in to
suggest working up a complete plan before yanking out what's
already there.
Jimbo / '76 Sovereign