How to extend my EA81  steering shaft properly  for my 4"lift

Is this the last thing you need to do to finish the lift?

Never done a lift myself but was preparing by collecting different length steering shaft splined bits n bobs over the years, so I think the trial and error method exists for you to measure up how much is missing, trail the wrecking yards for right length

PS or manual rack may also make a difference in the parts available to try as I noticed my PS unit has a longer shaft coming out if rack for starters so maybe if you had PS, just some manual bits may do the job