My Dad had a John Deere B model too Al. He sold it when I was a kid.My dad told the story of having a drag saw that mounted to the back of a John Deere model B .It drove off a pitman arm attatched to the power take off and recpricated about like a hay mower back and forth .Every so often it would get stuck then the tractor did the dance back and forth .
The old boy said that two stout young farm boys could out saw it with a crosscut ,they just couldn't out last it .
Ha reminds me of parking an "A" I have plus a D4 Cat inside of a metal roof shed during winter ,no cans over the stack .We had a B too. I remember asking Dad what the stack next to the muffler was for (air intake) He told me it was for hornets to make a nest in.