When at a Dodge dealer in the early 80s (I was the tranny guy there), a local aircraft service company brought their air craft tractor in. It was a large box made out of plate steel (about 1/2" thick). The thing was crazy heavy, maybe 10,000 lbs. Had 22" rims on the back with a huge diff, like out of a 10 ton truck. 15" wheels on the front, 360 dodge V8 a 727 transmission and a gianormus trailer hitch. They wanted a fresh motor and transmission with a little more grunt for pulling in jumbo jets. The motor guy refit the 360 with a Dodge Direct Connection drag strip set up complete with cam, intake, carb, distributor, but stock manifolds. The tranny got all the Direct Connection recommended mods to go with the motor. We road tested on the lot, If you held the brake on and launched it it would hang the front wheels. Top speed was about 20 or 30 kph at 4500 RPM. Almost cleaned a new K car off the lot trying to stop it, the driveshaft brake wasn't very effective for slowing it down.