I am trying to beat 2 Duramax trucks in my street diesel class. Otherwise, I use the truck around the farm, when the pulling season is over. The truck has the 215 hp pump and the pump was rebuilt. The retard notch plungers were replaced with a set of used non-notched plungers, along with 191 delivery valves and machined DV holders. The turbo is a 64/71/14.