To model Dale Earnhardt Jr.’s 2004 Daytona 500 winner, Jay Savarese began with a Revell 1/24 scale kit and modified every part he used, scratchbuilt others, and 3D-printed still others. He plumbed and wired the engine, and the interior includes a race-exact dash, Koolbox, water bottle, and handwritten note from Stevie Waltrip.