I talked to a guy last summer at a car show that was sitting in front of his Ford F250. A friend of mine knew him and I asked him whats the deal with this truck with all the classic cars. He basically told me it is what is under the hood. I can't remember everything he did, but he took a stock diesel engine, cranked up the injector pump, put another chip in, and is running propane gas mixed with the diesel fuel. He said he takes it down to the local drag strip on grudge night and takes all the money from the hot shots in their souped up mustangs and camaros. Not even close. Don't know what he runs, but am guessing something close to this guy.