[rellick]

My 8v92 475hp is pretty much the same as what Jon and Gordon say about the 8v, I like the sound and it is nice in the flats and at about 70-75 around 2000-2100 it seems the happiest. My 77 with the 325hp 8.3 cummins has quite a bit better pick-up and pulls better in the hills, just doesn't need the rpm to make power like the 8v92, 10,000lbs weight difference but 150hp less with the 77. Haven't checked into rpm torque differences between the two but the 8.3 definately will take the checkered flag in a race, as far as mileage, I haven't checked that either, but what I hear the 8.3 mechanical will get between 10 and 12 mpg in this size of coach.