but chassis grease is not appropriate for your steering box.
in 62 or so.. ford put out a service bulleting specifying a NLGI 0# grease. cornhead grease is a poly urea based 0# ep grease. quite ideal. You can also get ep 00 # greases from many sources.. like snapper dealers and stens lube dealers.
average every day chassis tube grease is nlgi 2# and will cavitate and make a hole around the parts needing the lube.. leaving only residual film ont he parts needing the lube.
better than dry and toasty.. but not as good as oil or light grease lubed.
as for the jd dealer. you'd be surprised. in days past you could walk in and get parts for MS carbs.. your pre 65 ford came with a ms carb. :)