Very nice, you don't hear many Detroits on the road that are worked much anymore. The 8V71T is probably close to 350 hp stock so that's a nice upgrade from the N model. There's a 70's Kenworth W900 dump truck with a 8V92T that I see from time to time around hear, it sure sounds nice.It is running on six cylinders for sure. The crank mush have broken off behind the first two. It does not sound happy that is for sure. I found a 8V71T in a low mileage fire truck that was literally given to me. I have got to go get it. (Not really an issue since I own a towing company) Then decide if I want to rebuild it or just throw it in there and see how it goes.