that was a pretty good system when it worked, but ---they suffered "lot
rot" badly and tended to split the internal diaphrams. The oil lines
would also get brittle and leak. The replacement pump may be a little
pricy, so you might consider putting a replacement fuel pump on -in the
same location,from an earlier non VOR model, and mixing your own fuel.
Plug off the extra lines and choose a vacumn source for the new pump
from the same sourc that ran the fuel pump on the VOR. That should do
it.