an extractor wouldnt work on mine b/c the sender is brass. it depends on the level of corrosion. worse case, use a small blade screwdriver to make a notch in the side, then, shove a bigger screwdriver in to spin it out. mine was so corroded i ended up just retapping it.
'90 YJ, ford 8.8, SOA, lincoln front, aussie rear, 4.88s, swampers.