I have a 20 rack in my 90 Celsior , the wiring plug is different but you can change the bits that push into the plug as they are the same , the other thing is that the 20 rack has no steering dampener on it , must have some kind of internal dampening , I prefer the original rack feel , still fits though .
Also I now have more lock on one side than the other , I think it might have something to do with the missing braket that the dampener mounts on .
The price on the 20 rack was real cheap and it had low mile's on it , that's why I tried it , I will be rebuilding my original rack and refitting it as I preferred it .
I would get another rack the same and rebuild it then just do the swap over if I was you .