I was referring to pre 2002 1 tons with the 6.9 IDI, 7.3IDI, 7.3 Powerstroke being the good trucks. The 6.0 and 6.4 suck.
Duramax Allison has been a good combination for us. About 200K fairly trouble free miles per unit. Had nearly a dozen of the things.
Used to get 16mpg average. Now with the emissions crap my newest units are getting less than 10.
For the money, I'm switching to gas units.
Ok, lets go this straight only the EXTREMELY early 6.0s suck, the others ones are decent unless they are modded crazily. The 6.4 is a fine unit. Don't make me bring up the GM 6.5 diesels.
On another note I don't know how soon you're looking into buy this but 2010 is the last year for the 6.4 and the 6.8 V10. The 6.4 will be replaced by a 6.7 and the V10 will be replaced by a 6.2 V8. I don;t know if i'd be comfortable buying a early first model year engine. Just my 2c.