I’ve seen enough vehicles that it takes a lot to make me go completely slack-jawed. This incredible vehicle, however, succeeded! What you are looking at has parts from several different trucks and some other things tied together with a custom frame, although the builder goes by the highly modified cab, which makes this at least partially a 1957 Kenworth. It’s listed here on craigslist in North Denver, Colorado for $50,000.

Of the pictures in the ad, I think this one expresses the sheer scale of this beast the best. The seller says they haven’t worked on it in at least three years and it’s time to move it along. The frame is totally custom, with the rails being 35 feet long each. The front suspension, which is new, is normally used in motor homes and buses. The rear drive set up is from a 2007 Kenworth (so we have at least 50 years separating the Kenworth parts) and the wheel base ended up being a massive 335 inches!

The engine is a 12V71 V12 Detroit Diesel removed from a stationary generator. On top of the 12 cylinders are two 6-71 superchargers. The custom 2-pass aluminum radiator was sized for 1,400 horsepower. Naturally, there’s a huge Allison transmission installed and a spare one that goes with the vehicle.

I suppose theoretically you could actually use this to pull a trailer, although I’m not sure why anyone would? However, I did fantasize for a moment showing up at the race track with this pulling my also hypothetical race hauler. Wow!

Here’s an artist’s conception of what the Thunderhead (named by the builder’s son for the sound it makes) would look like once completed. If you have a desire to own a truly unique, one of a kind vehicle, I think you have found one that would fit the bill! I only hope I get to see it on the road once it’s finished. Let us know if you are the one that buys it!