How too remove 94 ford thunderbird power steering pump?

Do I have too take the pulley off too remove or can it stay attached

If you are going to swap it (core charge) for a rebuilt, keep your pulley. Might be threaded, might be press-on. Do not distort it when trying to get it off, or it will wobble later. Apply heat, should pop off.

If this is a 4.6 the pulley can stay in place. I'm not sure about the v6. Getting the line off is tough. If you remove the oil filter it helps.
usually they all need the pulley removed