There is no problem in getting the non power racks.  I have these, new ZF,
for $299.  I think you will also need a steering coupler to get this to work.
 And the older ones had a bigger steering wheel for the "armstrong-steering"
method.  That is all that you need as far as I know.  I had a '84 with no
power steering that I put a 2.1l Vanagon engine into.  That thing was
noticeably more powerful than other 2.1l Vanagons that I had driven with a
power steering pump.  Just FYI.

Thanks,
Ken Wilford
John 3:16
www.vanagain.com
Phone: (856)-765-1583
Fax: (856)-327-2242