I have a question on the fuel filter set up on my 88's and super 88's. I have a row crop 88 with the horizontal two filter set up, and my other row crop 88 has the single vertical filter, along with my other two super 88 diesels, why does one have that set up and one have the other? I know I have seen many examples of both, just wondering if they did a certain style on certain years or? Any help would be greatly appreciated.