peterbrazil

This one is on the longer end already - 91". I can find up to 114", but that would've only allowed me to extend the frame 6 inches after flipping the axle (the drive pulley is biased about 3" forward of the axle centerline).

Gearing. The easiest pulley to swap out is the drive pulley on the engine with a bigger one. But on my particular mower, it has a molded frame guard to keep the belt from slipping off. So I'll be putting a smaller pulley on the transmission. But keep in mind a mower is designed to go slow, so you should also upgrade brakes, steering, suspension. Check out https://www.instructables.com/id/How-to-make-a-racing-lawn-mower/This instructable shows a lot of the process of making a fast mower. Most of the guys making racing mowers basically turn them into a go kart with hydraulic steering, geared transmission, tight steering.

Thanks! Those are some very inspiring words. I'd love to win it, but there are a lot of other really cool projects out there. This is a project I had been interested in doing for some time, so it's a happy coincidence that it corresponded with a contest. I'm in western Washington, and I'm always looking for an old truck cab to use to turn my ranger into a 4x4 rat rod. I just love that car style.I have a treehouse instructable from a couple years ago that you may appreciate as a woodworker. It's transformed a bit since first built...https://www.instructables.com/id/Treehouse-Build/

Thanks for the tip. I cleaned it up decently well, but have some edge banding for people without tetanus shots.

It has more power than it knows what to do with. The next step is Gearing. Then brakes

Ha ha my wife doesn't know about it yet... She came to my shop to bring me coffee, and I had to hide it under a shipping crate!