A friend has just installed a 598 from dyno flo for one of his costomers. I talked to him after the motor was in. He said if he had known all this he would have talked to his costomer first. Now that the motor is in he is going to run it. He didn't check anything, just bolted it in. He is also giving it a 300 shot right off the hop. The first race wont be till august. I'll be watching that one closely.