If you want to watch the scene evolve, from the 20s to the modern day, Hot Rod Magazine's Top 100 Influential Hot Rods is a great place to start. One thing we didn't know before reading through their list was that the entire monster truck scene started with a single '74 F-250:
[Big Foot] began as a promotional stunt for Bob Chandler's four-wheel-drive shop and ended up creating an entire monster truck craze that led to several sanctioning bodies and fans worldwide. Version 3 of the truck appeared on the Apr. '84 cover of HOT ROD. There have been 17 Big Foot trucks built since.