This will be an excellent project! I'm surprised that non of the model companies ever made a kit of the Peterbilt, it's trailer and Valiant. I'm sure they would sell like "hot cakes". Maybe something for Mobius to think about. Good Luck with the project. I think if I remember rightly, the main truck in the movie had a Clatterpillar 1674 diesel with a 9 or 10 speed transmission. The surviving truck has a Cummins NTC 350. As for the second truck (The one with the KW mud flaps in the scene with the school bus) maybe a Cummins "Iron Lung"? Not sure!