1) The belt does fit...it is a b!tch to get on. Took 2 people and 90 minutes for mine.
2) An o2 sensor is not related to the MAF. The MAF connects to the air filter and then the intake tube or boost pipe connects to the inlet of the sc. At least that is how I did it.
3)
http://i165.photobucket.com/albums/u...r/100_6419.jpg
Right where you see the Steeda boost pipe go into the fender is where the MAF is, then the filter is attached to that.