Long time fan of Rudolfs work. Initally designed to run on peanut oil or vegetable oil,they have proved to be the heavy equipment engine of choice. I cut my teeth on Detroit Diesel models 4-53, 6-71 and 6V-71, along with Caterpiller V-8s in the late seventies and eighties and then built 8V-71,8V-92T and Cummins VTB903 V-8`s later on. Last shop job ten years ago we played with the Series 60 and while they work fine, I just miss the good old days. The Cummins B series is a great motor and the A series is so dam cute I have wanted to put one in a bike frame forever. The Italians make some really cool little diesels for riding mowers and pumps too.
Still a fan of the EPA incorrect two stroke diesel. Very simple and just run forever. I have a bunch of manuals if anyone has any of the relices I mentioned above.