As I have never ever seen any of these vehicles in person, scale is quite difficult considering i cant find much info on vehicle length of the step van. I would like to ask you though, which one should change, should the stepvan be smaller or the cargo truck be bigger? I based its scale on the USFS fire truck and the roll back tow truck since they are similar types of vehicles. I dont really know what else to go on atm. Thanks for letting me know that its too small. I almost started doing its lights. EDIT : Better guys ?