In 73 the rubber biscuit (rag joint) should be on the steering box and the coupler up near the firewall.
In 74 they put the rag joint near the firewall and returned the coupler to the steering box.
I suggest before you invest any time in it you check for the location of the slack.
Have somebody rock the steering wheel with the engine off and check each joint. I'll bet most of the slack is in the box or the rag joint, not the coupler.
If it is in the box they are partially adjustable.
If it is the rag joint they are expensive if you can find an original one but most people get the rubber disks from the help section at the autoparts store. Stack two of them and it will work fine.
If you want to pull the column it's not too bad.
1. Disconnect the Battery.
2. Disconnect the two to four wiring harnesses coming out of the bottom of the column.
3. Drive out the roll pin on the steering box that holds the coupler/rag joint to it. Use a large screwdriver or I use a pickle fork to pry and separate the coupler/rag joint from the box. Don't worry if it will not completely separate you really just need to break them loose.
4. Disconnect the shifter rod at the column if it is a column shift.
5. Remove the 3 bolts on the base of the column holding it to the firewall. (Not the two bolts holding the main shaft tube to the base).
6. Remove the 3 nuts holding the lower column support to the dash. (You will see a large funky looking washer and a white square bushing under the nuts.
7. It will drop and simply wiggle it out. If you haven't broke it loose from the box yet do it before you start to pull it out. If not it may cause the collapsible portion of the column to separate.
Hope it helps.