Good to see this in pictures. I took the easy way out and had the fuel filter replaced when I had the headers installed. With 61K or so miles on the car, I figured it was due.
I had that same problem you mentioned with a sluggish gas gauge, but I didn't notice if it has gone away or not. I think it has because I got the tank filled up today and it didn't take nearly forever for the needle to register the full tank. Now why would the fuel filter affect this reading on the gauge? I thought the fuel gauge sending unit is in the gas tank.