Being in the market for a 4x4 the most common trucks I have seen is the 97-2003 f150. Usually between 150-180k mileage. It is my understanding that during those years ford had two plants producing 4.6l engines; Romeo and Windsor. W for Romeo or 6 for Windsor as found on the VIN. I’ve become more aware of the differences of these two engines as I’ve researched them, but really, is one more reliable than the other? Anyone have experience with either?