Well I guess I really don't have a good reason for using the stock water pump. It was there and it was fairly easy to machine out. The goal is to put this truck on the street(not a DD), so im going to try to keep as many original parts hanging on the front of the motor as possible. I obviously still have a lot of ground to cover, but I think im off to a good start. My pump also needs some work. I don't have a governor yet and the cam needs reground. The pump originally came off a generator, so other internals also need to be changed. I believe there is several different options for governors, anyone have any info on this i.e. electronic or mechanical type?? Wish I could also have dynamic timing. Then theres figuring out injectors; I have an idea for that, just need to keep refining my prototype.