does anyone know the difference in pitman arms??

As always, I found out the hard way...
I ordered a new one from AdvanceAuto.com
When I got it, I painted it and tried putting it on.
Didn't fit
Found out it was for manual steering
So now I can't return it either.
Power steering has a larger nut too.
I think it was 1 5/16" vs 1 1/8"
Which arm do you have that you cant return?
What year did you order it for?