If you could only do one upgrade on your vehicle, that would make the biggest impact on the looks and drivability, what would it be? Well today on GEARZ, Stacey answers that question by installing a Katzkin leather interior into a Jeep Compass and showing that if you've got an open weekend, you can do the same thing on your car or truck. After that, He jumps back on to the Street Sweeper project to lay out the interior and the rearend, and finally drop that huge Hemi into place. If you've ever thought it would be fun to build a sleeper car, This is one '73 Plymouth Satellite that shows how it can be done!