How to remove PS box

Pry bar moved it about another 1/4". I can see the end of the splines through the roll pin hole, so I sprayed it down with PB Blaster and I'll let it set for a bit. Starting to rain here (car is outside), so if it picks up, I may be out of luck for a while.

I also think I see what must be a master spline on the top of the steering shaft. It's like a dead spot with no spline. Is that the only one like it on the steering shaft?