In Oz they called these ag tractor graders with the extended frame "greyhound graders". In central Queensland about 20 klm east of Longreach there's a little town called Ilfracomb which has a free machinery museum and best of all at least 25 graders. About half are pull type, the rest self propelled. Two or three are "greyhounds". There is a 3,yes three, cylinder grader and a 3cylinder Cat dozer, both WWII vets. My favorite was a horse drawn machine with a long platform where you could walk to the back to adjust the rear axle. The operators seat was attached to the circle which was turned with a hand crank. Well worth a look if you're ever in this part of the world. I spent more time here than I did at the Longreach Stockman's Hall of fame. Too bad I didn't have a camera, kick, kick!