Seats
 

Hey guys i have a 2000 ranger ut has a bucket seat and was wondering if the bucket seat from a 89ranger would work

Read here: Using Seats From Other Fords In Your Ranger

And also click on the Links in that article

The seats will fit it is the tracks that would be in question, they may be welded on to the seats in your 2000, they were bolted on in earlier years, so easier to work with.
So you may need to cut off the 2000 tracks and drill holes in them to bolt the '89 seats to them

The tracks bolt to the floor and the hole positions in the floor changed over the years, and you could re-drill the floor pan, but usually easier to use original tracks and bolt new seats to them
Unless you want to add power and/or heated seats, then you need to change the tracks most likely