the 4wd fenders are all the same. the 2wd fenders are flatter.
i have used fenders from 79-83 on my old 81 and they were all the same.
they were the same on my 81 and 82.
just look through the rig galleries section, all the fenders are the same.
even when you order replacement fenders they are listed the same for 79-83.
derek