A Ford wrench is a monkey wrench that Ford had built with their name on it.
The only difference between a Ford wrench and a monkey wrench is that the Ford wrench came in the tool kit of a new Ford car. That was back in the day when people who drove a car had reasonable expectations of needing to work on it. Baling wire, pliers, nail file, bubble gum, etc. all considered as normal as hooks in a tackle box.
Yeah, Baling wire, still a constant in most man caves.
To add to the confusion
https://en.m.wikipedia.org/wiki/Monkey_wrenchThe biggest pipe wrench I've used is a sixty inch. Usually two of us went to get it and anywhere from three to six were involved in using it. A cheater pipe was almost always involved, leaving two to lift and position it and one to make sure that the jaw was set, then join the club on the cheater. I watched four guys fight a left hand thread for about a half hour, then went and told them... they ALL knew that all threads above the rotating table are left hand,, but they weren't thinking..
Of course if the project is not being held, then you gotta have a backup, and then IT has to have a cheater,or the torque will just lift what you are working on.
These are handy but don't take the abuse of the oilfield well.
http://www.amazon.com/dp/B001DNOXK6/ref=asc_df_B001DNOXK63796006?smid=A1G7UTD...