To be sure, you need to find the bolt pattern (e.g., 5x150mm or 6x139.7mm) and the wheel offset for both the 1999 Ram 1500 and the 2005 Dakota. This information is usually found on the inside of the wheel itself, in the owner's manual, or online via a parts lookup using the VIN. Only if both those specifications match will the wheels be likely to fit. Even then, tire size needs consideration.