I have been reading threads trying to nail down exactly what I need here, and am now thoroughly confused. From what I understand, I have to replace the fuel pump and fuel filter that came on the truck because they will not work with the LS1 and its electronics. I am pretty set on getting a Walbro 255, but I don't know exactly the one to get. Is there one that is basically "bolt in?" Is there one that is easier to wire in than the others? Any kind of advice and especially part numbers and experiences would be greatly appreciated. Thanks in advance!