I was given one of these engines back when I was building my race tractor. I used a Cub Cadet 70 frame and put this baby in it. I had to run a little higher air pressure in the front tires and a few cups of water in the back wheels to get the balance right, but boy do I get the looks from the chicks. That alone outweighs all of the extra work that I had to do. As far as exhaust goes I did a 12 into 1 into 12 again just to kind of play around with my conduit bender. And the carburetor is just a plain old 55 gallon drum with a garden hose as a jet. I mounted the tank up high to get the right head pressure for my float, which is a basket ball, and for starting the beast, I have a black powder ram set-up (an idea that I got from my civil war re-enactment days).
