I tried to do a search, but Iam not finding what I want. Iam putting a fuel cell in my XJ. I just put one in a YJ, I use an alum. cell and cut a sguare hole in it and mounted the factory YJ pump in it, It turned out slick and simple. Can I use a YJ pump instead of my XJ pump any diffrences? My XJ has the round pump with the lock ring it wount just bolt on.