I was thinking about the 160 amp alternator. Are you talking about a rebuilt 160 amp from the auto parts store? The auto parts guy asked me something about "snow plow option" I wonder if that was the 160amp unit. Getting an alternator at a Dodge dealer would probably be cost prohibhitive I was looking at the belt tensioner today. I saw a nut that seemed to be holding it on, I wasn't sure if it was the nut to turn the tensioner to release the tension on the belt. It didn't turn when I put a socket on it so I went to plan B which was to use a slim pipe wrench to fit over the end of the tensioner that worked ok, I also tried a welders vice grips which also worked. Not a lot of room by the tensioner because of the coolant and washer reservoirs. I saw some little holes on the tensioner that look like they might be for a special tool or something. I also see there is a mounting bracket (alternator/compressor) that also looks like it has to come off to be able to slide the alternator forward off the mounting bolt(s). I would agree that it looks like one of the easier units to remove. I've taken some off over the years that were a nightmare to get at, way down toward the bottom of the engine where you couldn't see the lower mount bolts, could barely get your hands down there, etc. I downloaded an 04 shop manual that looked similar to an 05. It warned not to let the tensioner "snap back" once the belt is relased or the tensioner could be damaged. I'm waiting for the weather to clear so I can take the alternator off as I don't have room in my garage to pull the truck in. probably do it later in the week.