Autocar Yard Tractor / QSB 6.7L, Front Sump (3958209), LMRO Turbo 4955694, Injector 5263262, Rear Gear Hsg 4936424, Flywheel Hsg 4941044, Cyl. Block Plate 5290910, Front Oil Fill . Reviva engines are a perfect aftermarket choice for diesel engine applications. All engines are made to the exact serial number of the existing engine which drives cost out of and simplifies the install process. Every Reviva engine is machined using state-of-the-art equipment and assembled using precise and repeatable methods. Reviva follows documented lean manufacturing processes and principles to create consistent quality and dependable outcomes. All drop-in engines are Dyno Tested, and all long block engines are SIM tested. All parts used are OE or OE equivalent, as well as OE specified, tested and validated prior to being accepted and approved for use by Reviva.