If you like your warranty, don't install it. One look at that system by a Dodge dealership and they will deny warranty on just about everything.
I don't feel that enough is known about adding propane to a 600 at this point. I wouldn't do it to my truck. If your looking for more power and increased mileage, there are other methods.
But, if you want to kiss your warranty goodbye (many guys on here have chosen that route) then let us know how it goes!