I have a 2000 peterbilt 379 exhd stand up engine is a 3406E cat set at 625hp 18 speed, 3:36 gears on 24.5 lo pro tires, 30k miles since overheads run on it  truck Is in good condition and very  well maintained drive tires at 55-60% steers are brand new Recently put 4 core radiator and pdi turbo on it.  Ive put 115,000 on it and it had been very reliable for more info call text 7852590218 or trade for newer f250 diesel