Best way to remove steering coupler pin

Here is what I am looking at
I finished the car 2 years ago, and drove it all season, no problem. A re-valve power steering box, by Firm Feel. In fact all new suspension Firm Feel parts.
This year I was out coming back from a way show and the steering wheel when form being at 12 o clock to a 1 o clock position.
Had the car re-aligned the steering wheel was again at 12 o clock. Dove the car for awhile and then the steering wheel went to a 11 o clock position. The steering is tight, no sloop.
Now it is driving me nuts, I can not find anything that would do this. Even with the steering wheel in the off positions the car drove straight. So I am thinking that the coupler is off, but just looking at it seems to be OK, the blocks are tight in the grove, the square part. So I am getting another rebuild kit and see what happens, any ideas as to what is going on?