I replaced one with the box still in a 64 Belvedere wagon once. I pulled the column out of the way, and it wasn't hard to do. I used a small flat screwdriver to pry the old seal out. Then I packed a little tissue in the opening while I steel wooled the shaft near the seal surface.Tape up the splines so they don't cut the new seal, and remove the tissue and install the seal. I used a socket the drive the new seal with. Good luck.