1988 PETERBILT 379 63 in Flat Top Sleeper; 855 Block Cummins Engine 400 Horsepower; 10 Spd OD; Tandem Axle; Drive Side: Left Hand Drive; Big Cam III Differential Lock, Dual Exhaust, Dual Breathers Engine Manufacturer: Cummins Horsepower: 400 Transmission: 10 Spd Suspension: Air Ride