I replaced my 6-354. After 30 years and 4000 hours, it needed a top end overhaul and injector system overhaul. The cost approximated the down payment on a Cummins 6BT, and no guarantee the Perkins would be any better. I also got a modern injection system, new engine guarantee and no worries about modern fuel blends. On top of everything else, I had a counterclockwise engine. No, zero, none nowhere water pumps. So I bit the bullet. Cummins is quieter and smoother than the Perkins. Some smoke on startup but a block heater should cure that. It is a lighter engine as well. The turbo is nice--eliminates smoke once the engine is started. All maintenance is on the port side of the motor, so I don't have to crawl over it to do routine maintenance. Contact me if you have any questions. Bob Salmons Veronica Willard 40 RPH