They made two different types of power steering gears, the plumbing(how it connects) is different, they are rare.
2wd or 4wd use the same power steering gear except for that rare type I mentioned above, the 4wd truck upper control arm is mounted different, that is why they can have the rag joint at the steering gear as the upper control arm is not in the way on the 4wd chassis.
If your using a PS 2wd tilt column on a 2wd PS truck you should not be having issues, issue happen when you start using PS columns on non-power steering trucks or vise versa.
The combination switch interchangeability has to be close to the same years, I have transferred the guts from one to the other so the plugs would be the same as the wiring harness I was using, but there are differences, the horn wire and turn signal assemblies are different on some comb switch assemblies and are not transferable, the headlight assembly has never been an issue for me, they all are interchangeable for me so far.
Tilt columns have larger tubes than non-tilt columns, so the combination switches are made to fit whatever column you have, whenever I buy a column, I try to buy the year I need, I have all early wiring harnesses, so I need to find/buy early switch hardware which didn't used to be an issue when I first got into this shit, but now it is a pain as there isn't a lot of 720s in the yards anymore.