I'd love to get all of your guy's input on putting a cummins in my V25000 89 Suburban. The truck has been in my family for many years now, barely put on 2k miles a year it's only used in the summer time at our lake house (still has less than 100k miles on it). Although i am now in college and my Ex daiy driver was a 2002 1500 suburban. So I have now inherited the truck from my father and am driving it around college. What I would like to do is put a cummins in it clean up the rust, get better fuel milage and hopefullt be able to pull our large boat (12,000lbs) at our lake house. I know that doing this swap on an 89 suburban is kind of hard as it doesnt have the IFS of the later models so theres some clearencing of the front subfram that needs to be done and the truck will either have to be lifted to clear the final valve cover or the firewall will have to 'massaged' a little. So my questions for you guys; 1. Are there better solutions for what i am trying to achieve other than buying another truck? 2. Do you think that swapping a cummins will allow me to pull something that heavy? (I know the truck wil physically carry the boat, we've done it before but the old 350 chevy won't pull it up any hills) 3. Will the stock drive train suffice? It's currently got a 4l80e and im not sure what differential is. And please feel free to add your thoughts below if theres anything else I should be thinking about.