R686, Heavy Duty Trucks - Cab and Chassis Trucks, Mack EM6 MECHANICAL, , Ugly ole Mack. Runs and drives real well, clutch is good, transmission is smooth. Flatbed body isn't very nice, better cab and chassis than anything. If you are looking for a cheap old reliable truck, this is the one. Priced to move...Ask for: JAKE, 300 Horse Power, Spring Suspension, Wheels, Wheel Base, , Tandem Axle, Ratio,