Those trucks have been through so many improvements and design changes since the 80's, it's crazy. Dare I say, one of the most evolved forms of motorsports in that timeframe? Think back to Bob Chandler, who built the 1st Bigfoot... that thing had off-the shelf semi-truck leaf spring suspension, which he heated up and put a little more bend in them, with planetary axles and farm equipment supply store-bought terra tires. All on a factory production frame and body, with a souped-up tunnel ram gas engine. The trucks of today are NOTHING of the sorts. And that's only been since... what? 1980 or so. Don't get me wrong; it's entertaining as hell to this day.... but nowadays, they've bastadized it so much with "Monster Jam"that I think sometimes people forget just how much has changed with these machines - in not too long of a time.