Wayne I am gobsmacked that you got those for that sort of coin and in such good condition. I have only ever got a Greenie for free once, still sitting here, but with a blown motor and nowhere in as good condition as what you have there, good score, I'm impressed..
Now with the Tractor do you plan on still being able to use it as a mower or just as a toy/play thing? Next I'm interested to know your thoughts on getting the drive from the output sprocket which is vertical to a horizontal pulley in a very small amount of room. I'm assuming you want the motor north south which means the bonnet would need a lot of extending as will the chassis. Anyway good luck I will watch with anticipation.