On my 88 I had to unbolt the ragjoint on the drivers side so that I would get the drivers side header in. On the passenger side I dropped the starter, put the header in and then reinstalled the starter. A little extra work but overall not too bad.
Driver's side on mine was cake; did not need to remove the steering shaft. For the passenger side, we unbolted both motor mounts, and got the engine up a ways to slide the header in.
steering shaft was fine on mine. all i had to do is just tilt the pass. side of the engine up a bit to get it to fit in. the x-pipe caused the most headaches