[Zedn]

There is not a great deal of difference between oxygen sensors. The main difference is wide band or narrowband (wide band cost a lot more and gives much more accurate readings) and whether they work off voltage or resistance. I used to have a Nissan that had an 02 sensor that worked off resistance instead of voltage. That is fairly rare but it confused me when i was trying to install an A/F ratio guage. The reason you get different numbers of wires is basically to do with internal heaters and sheilding.

If i were you i would just go to the wrecker and find something that fits. When you get the engine running you will know if the o2 sensor works because the computer will tell you. Also most computers will run with the o2 sensor not working, they do this in different ways such as some will run in limp mode, some will revert to default values and some will just go off other sensors. Once its running you can go from there.

This is just my thoughts, I have no experience with Fords.