MR6, Heavy Duty Trucks - Garbage Trucks - Packer, Mack AI350, Automatic, 100% Reconditioned! This truck has had a recent in-frame engine overhaul. The engine is strong! The Heil body has been completely reconditioned including: All new repacked cylinders, brand new Heil control box and all new Heil wiring harnesses. The truck also has brand new tires., 350 Horse Power, Suspension, Wheels, Wheel Base, , Axle, Ratio,