Randy I have two M-2 Freightlliners converted by the company that did my truck for sale. They are new 2008 but the big difference is that they are 112 chassis, meaning they have the big engine and trans. MB engine of I think 410 or 430 hp. and 1550 lbs torque. they are a liner motors so when it is time to rebuild you just inframe it. There is one in viper red and one in silver. These trucks are the same price as your sportchassis but have a 40,000 dollar upgrade due to the drivetrain. call me 909-816-1101 and I will point you to the owner of the company.