Just thought I'd ask a couple question's for you powerstroke garu's out there. Ok so I'm considering purchasing an F-550 cab chassis with a 6.0 with about 150k on it. The owner says It's got an exhaust leak on the upipes going to the turbo so It's not making the boost and power it could be, he say's it's maybe not up to driving home, he says it starts right up and runs great apart from the leak. does this sound right?. Other question is should I take the risk of buying the 6.0 over the 7.3 since I have heard such bad things about the 6.0. what do you think?