It is a modified AMT T600. I modified it according to Ken Smith’s Car Modeler instructions. The lengthened frame requires a longer faring than is available in the kit. Jaymar of Australia offers a lengthened faring, but when it arrived in the mail, it was crumbled. They were kind enough to send another made with better resin. The colors are based on an Indianapolis trucking company’s paint scheme. The cab over is base on a tractor I saw in a 1976 Overdrive magazine.