2007 GM/Chev (HD) 8.1L GAS, Truck Delivery, Engine Assys, Fits to: Workhorse Custom Chassis W62, (Used) 2007 GM 8.1L, ENGINE ASSEMBLY- Displacement: 8.1L, Horsepower: 320, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921, Horse Power 320, Serial# Other, Casting# Other 5B4MPG2G973430320