I went to pick-n-pull today and tried to find a sending unit for a 31 gallon tank I am swapping into my K5, in place of the 25 gallon tank I took out. I could only find one with four outlets, where my original one had only three. I am guessing the fourth outlet is for the return line that comes from fuel pumps with three ports. Is it ok for me to just cap off this fourth outlet and install it in place of the three out one? It seems like it would be fine, but I figured I better ask, just in case there will be problems if I did it.