65 Cuda Power Steering Box and Coupler Installation Issues

This is to the best of my recollection. The hole on the steering shaft is a guide hole. Nothing goes through it. The metal dowel pin looking think needs to go back through the steering shaft some where south of the guide hole. Your picture is blurry but it will be obvious where it goes It will need to be pressed in the hole too. Then you assemble from there. I cant figure out what that large bearing thing is , Never seen that on a early a steering column. Normally you put the column seal there, The steering column bearing is higher up where the turn signal cam goes, and is much smaller The smaller hole in the coupler is for a pin used seat the coupler, However you have a bolt that goes through the larger hole to secure the coupler on the steering box shaft ( it seats in the non splined section of the recessed portion of the input shaft that you have pictured). you will need the steering wheel installed to properly line up the coupler to the shaft. The large screw that holds your coupler onto the shaft should be pointing up but towards the driver side. I have installed the coupler onto the shaft then onto the steering box without taking the column out. Of course I dont take out the metal dowel pin cause its a pain to get out and in and usually is in good shape.
Below are some photos and site that explains it better than me!
http://www.barracudarestoration.com/Barracuda_Restoration/Steering_files/droppedImage_5.jpg

http://ccco.s3.amazonaws.com/ep_photos/735/735_steer-coup_low_res.jpg
http://www.1962to1965mopar.ornocar.org/images/ml-houston-coupler8.jpg

Rebuilding a 1964 Plymouth Steering Coupler