I'm aware that most everyone runs without the VSS hooked up and feels no ill effects. Here's why I'm going to run it. Someone, ie FORD but a fair amount of developmental effort into the the stock FI system and they put the VSS on for a reason. I'm guessing some of you know more than I do about the Ford code than I do and how the computer uses or doesn't the VSS signal, but unless you've run with and without and datalogged it you don't really know how it's effecting it.
The parts are
1Cheap (30$ for VSS, 20$ for new cable, 15$,for new connectors if you didn't pull them with your harness)
2Bolt In
3Designed to be utilized in the system, not exactly sure how but see previous items 1 and 2