its in the archives - you can put headrests on ANY vanagon seat, except for
westy rear seats.  the holes are already there.
take your thumb and feel the top of the seatback, you can feel the holes in
the metal under the fabric.  take a knife and poke the fabric at the hole
area, pry out your old headrest sockets w/ a screwdriver, and pop them into
your new seat.
simple.

chris