Here we go. Talking about our toys. My "first" was a Case 450/550 and about 45 HP. Could not exactly tell as someone had replaced its diesel engine with an extended fork front end and a Ford Truck inline 6-cylinder gasoline engine. That tractor would go over 70 MPH, one time. With over 4 inches of dead zone "throw" left to right and back again in the steering wheel before it engaged any tire motion, no shocks, no coil springs, no brakes, "truck" like tires in front, and those big balloon tires in the rear, the person willing to risk their life to drive it that fast wasn't going to survive the return trip from speed to stop...so we drove it once to 30 MPH, nearly wrecked it, recognized what it WOULD DO, and never did that again. My son uses it still and it is a decent hay wagon hauler, a bush hog puller, and cultipacker dragger...or should that be Dragster. Oh yeah, almost forgot, I met the mechanic that swapped out the engines. The City used the diesel as an emergency pump drive. They named that tractor "Whacky Whacker".