This is a resin cab B model Mack built on an ertl Mack frame and converted to all wheel drive with spare parts from other kits. The Lowboy is an amt kit that was shortened and by removing the third axle making it a more common used tandem axle for the time. The Cat crawler is an ertl kit also, with the removal of the hydraulics and spare parts from other kits to convert it to an older style cable system. The roll cage is made from many sprue from other kits. The weathering is just something I do. I have never been able to make a model look like it come off the show room floor.