03 6.0 F350 dually crew cab?????????????

[diesel firefighter]

I was looking into getting an 03 F350 crew cab dually lariat 6.0 with 67k on the ticker for $21,000 from a ford dealer. Its very clean from what I was able to look at at the dealer its only has an MBRP exhaust on it. Our 7.3 had a lot of problems so I am a little weiry about buying the 6.0 with all the problems that they are know for. So my questions is it a good buy? What should I expect as far as issues or repairs? I don't want it to turn into a money pit like our 7.3 did.