41 Willys - 1/25 Scale in WIP: Drag Racing Models Posted February 23, 2016 I have been working on-and-off since August on this project. The chassis main section is made from 1/8" square tube. The box 4-link rear is 3/16x 3/32 rectangular tubing. I started the roll bar using 1/16" brass rod. I tried to use some of the the online sources from Tim McAmis and others. Here are some images. Thanks for viewing.