I'm admitting right now that I am clueless on trucks this old. i'll be asking a lot of stupid questions about things like, "where are my windshield wipers?"
Already found a cool resource:
http://chevy.oldcarmanualproject.com...to/48index.htm
checked the weights and dimensions...looks like uhaul doesn't have a trailer it will fit on.
with regards to the knob for a two speed axle vs PTO...your guess is as good as mine! i will have to check the owner's manual!