Hello Everyone, My name is Phil and I joined the group to obtain some infomation for 2 models I want to build. As a kid I saw a big red Mack R series pumper with the MacDonald, PA. Vol. F.D. and fell in love with it, but don't remember much about it. So, I want to build a model of a pumper on an "R" Series chassis and have the following questions: 1. Can this be a 4x4? 2. What kind of engines and transmissions came with this model? 3. Can this be on a 4x6 or 6x6chassis? 4. Was there ever an extended/"Crew Cab" available? The other truck I want to do is on an "L" Series chassis. What kind of engines and transmissions came with this model? And my last questions is are there any good books out there with lots of photos on both? Thank you for your help. Phil