Once the proper lengths are dialed in, the center shaft will need grinding to clean up to provide for the strongest possible weld. (Remember, the safety of your passengers will depend on how thorough you are at each step.) With the shaft measured, ground, and ready for welding, place the steering wheel face-down and covered on a protective pad. Then, with the firewall anchor plate slid onto the column and bronze sleeve pushed in, weld the shaft in place. Reinstall on the vehicle, tighten at the firewall and dash, and check for smooth turning operation. Some oil may be needed, but don't be surprised if there is stiffness until worn in a bit.