I know this is an old thread, but I wanted make a note about the above post, as people still read this thread when searching.
The AC Delco Number that Blake listed - TP1006 - is a spin on type filter... This is not the stock filter for the CUCV. It may be one of the filters that people are using for the spin-on upgrade, I'm not sure.
The stock CUCV Fuel Filter #'s are:
Napa Fuel Filter # FIL3136 - Like rdragoo said above,
or Hastings Fuel Filter # HHT-FF855
And possibly a few other brands