I have a 1968 mustang coupe 289 with power steering and a/c. What's the trick to removing the p.s bracket. I can get the pump off with no problem. The p.s bracket has a nut on the end of the bracket which I removed. The bracket spins but will not come off. It has a long threaded stud that goes into the head. I don't see anything else to remove to get it off. Please help if you can.