Yes I seen it, but I wasn't real impressed! The electronic fueling box by itself only added 43 HP!
I'm not to keen on the propane in the Diesel as it can not be controlled very well. IN other words Diesel fuel by itself can limit the RPM when the Injection pump gets to the "governed" speed, while the Propane will take the RPM higher than you may want! As long as there is propane feeding the engine, it will keep on running higher RPM's! Have seen a couple Blown Engines from the use of propane!
Wayne
amsoilman