pitman arm?

Moparts has a good tech article on this subject:

http://www.moparts.org/Tech/Archive/steering/14.html

You must have an earlier gearbox ,as the later ones are larger , moog part number for the early box for a body

http://www.moog-suspension-parts.com/proddetail.asp?prod=MOOG-K7074&PARTNER=gbasesecname&Sec=7945