65 Cuda Power Steering Box and Coupler Installation Issues

Hi guys,
Just got my power steering box back from Firm Feel. Taken apart my steering coupler, cleaned up and ready to put in my rebuild kit. I am re-using my old, fold over top piece because it is more sturdy and has a bit longer tangs than the replacement part. Also pictured is a new milled aluminum bushing for the steering column that Firm Feel provided . They said it was a new item, so I thought you guys would like to see it. Questions:

• Rebuild kit comes with a very tiny pin. There appears to be a corresponding hole on the steering column. I just don't remember taking that pin out and don't see what its function is going back together. Also a small hole in my coupler just above the shear pin opening. Seems to be solid inside...no pin. What is the point of that hole?
• Is there a proper orientation of the coupler to the steering box when I re-install it? Is there a 12:00 middle position maybe relative to the steering wheel?
• I don't see anything but splines on the box's shaft and inside the coupler. Tried to gently press together, no deal. Should I just tap with a small hammer to get it re-seated?
• Finally, I see you guys recommend taking out the steering shaft to re-seat the coupler and then press back onto the installed PS box. Do I remove the entire steering column or is there a simple way to just pull out the shaft? Steering wheel is already removed.

Thanks Guys!