I have no idea what kind of times my truck would run. Pretty quick for a F-450 though. A few days after I bought my truck I was on the way from FL to TN on I-75 and moved from the right lane to the left to pass an 18 wheeler. Got on the throttle, hit 83mph and that was it! Not cool! This is my 7th diesel so I knew when I bought it I'd have to play with it. I spent $2500 on a Spartan programmer, an S&B intake, and a 4" straight exhaust with the DPF delete pipe and almost doubled the horsepower! I'm running the 275 program right now and will probably keep it there until I stud the heads. I'm hoping to get on the dyno in the near future. I'll post up the sheet as soon as I do. I've seen a few of the Spartan powered 6.4's getting in the 540-570 range so far!