The greatest custom trucks are never really finished. It's true. The ones that really push the limits of creativity, ingenuity, engineering, and style end up becoming constant works in progress because they break new ground, venturing into territories of truck customization that few others would dare to enter. This means that these trucks end up getting built, road-tested, and tinkered with, and then, maybe then, they'll get blown apart to be dressed up for show. Lots of them never make it that far, and it's rare that they make it past the initial planning, build phase, and testing to the promised land of paint and interior work. We're cool with that. Most times, it's the unfinished truck stashed in someone's home garage or in a dusty corner of a shop that really appeals to our sense of custom. With so many cookie-cutter customized trucks rollin' today, it's the ones that usually never see the light of day that end up being innovative.

Here are four new rides that fit the bill and have at least a shot of seeing the road and the show circuit one day. Each one carries weight in the world of horsepower, styling, and fabrication. But each one also leads by a different example, bending the envelope of coolness and possibility in a different direction. Some flex big-time body mods, while others are a testament to the skills of the fabricator behind the custom frame work. No matter what the case, each will give inspiration to anyone looking to build a truly killer custom sport truck.