I went out into the garage, fired the 67 up I had power steering for about 5minutes, riding around. Then nothing, seems to fade away. I do have a rebuilt control valve, that I bought after I put put the used one in, for a back up. Just not sure where to start. I hate to start throwing parts at it, till I can find out what's wrong. I don't have a gauge to test the pressure of the pump. When I had power steering for about 5 minutes, I cut the wheel hard in one direction I did hear the power steering pump squeal. Just wondering if anybody else has run into this.   
mustang stu