I REALLY want a new 06 silverado diesel 2500hd or f350. A friend of mine has a friend selling a 99 F350 with the 7.3L Powerstroke and i THINK 4 sp auto not the newer 5 speed. Its extended cab, 4wd, rear wheel antilock, shortbed, Leer hi rise cap, shortbed, larger bfg all terrain 285/75/16 tires, it ONLY has 53k on it, and garaged most of the time, was used twice to pull a trailer and has a 97 fisher plow kit he plows his muffler shop out with when it snows in NJ. Also has a 12.5k hitch. He wants 20k for it. Im assuming this is probably good, but is the 7.3 really better than the 03+ 6.0L powerstrokes with the problems? Im looking to pull my 4k+ empty 24' enclosed trailer 90% of the time with it, is it bad staying with a normal 4 speed and not waiting to buy newer wit ha 5speed or the 6sp allison in the GMC/Chevy trucks with the duramax? I have not driven an 05+ f350 diesel OR an older one so dont know how to compare the two, anyone have opinions.