Dont worry about the HP and TQ unless you plan on sled pulling or drag racing. I have had the Cummins in my Dakota for over a year now with basically the stock frame except for the modifications to put the Sold axle in. My frame is only fully boxed to the middle od the cab from there back it is "C" channel style. I have yet to have a frame issue. I dont sled pull or drag race with it but I do put quite a bit of miles on it for a show truck. I just drove it to and from IRP from Scranton PA for the 2nd time and I drive it around the city all the time.