Tim -
Sorry about the Sears link. I posted the link from my iPhone while I standing in line at the movie.
Here's another source.> pic: Rapala / Normark Rapala Digital Fish ScalesThe Sears site says ...
Sold By: FishUSA, Inc.
Item#: SPM5835854203
Model#: RMDS50
I don't know how exact the pull-measurement has to be. I used my fish scale when I adjusted my steering box, but also used a little Kentucky windage, too. Bottom line - my steering is tight and the truck is a pleasure to drive vs. the quarter-turn play that it had before I adjusted. 'Course my steering wheel is now a quarter turn to the right and one of the spokes blocks the gas and oil pressure gauges.