I’m not sure if this is really a soap box jeep, but still a neat vintage piece.
https://www.facebook.com/marketplace/item/1675391245929395/
“Willys Jeep vintage wod soap box derby car! homemade very cool! Measures 52″ long. This is a great vintage piece that was made with pride, just imaging the father son team that raced this with pride for the US Army. Please take a look at the pictures, jeep has some missing layers of plywood, a broken bumper and one rail is missing on the back.”