Find a SN95 rack (I have a Cardone rebuilt and its fine), get the MM steering shaft to convert the Fox to the SN95 rack, get a new pump (warranty the one you have), and fix the leak on the return line at the pump. Install everything and be sure to put new teflon washers on the rack side of the power steering hoses. Fill the pump with a quality synthetic Type F fluid and hand prime the system by turning the pump pulley by hand. This is easier to do with the front end off the ground and the car properly supported. I had a buddy turn the steering wheel back and forth while I was manually priming the pump. Be sure the fluid level is good in the pump and start the motor. Slowly go lock to lock with the steering wheel and add fluid as needed. This is how I did my install and the pump is quiet. Once you run one of these pumps low on fluid they will whine from that point on. Typically if you replace the rack you need to replace the pump as metal shavings will get into the pump and kill it.
I look at it this way, once you have bought the reman units they are lifetime warranty so if one of them dies just replace them both. Also, if you get a SN95 rack realize that you will have to swap the inner tie-rods from the Fox rack to the SN95 rack. The threads on the racks themselves are the same but the SN95 inner tie-rods are longer and metric on the threads that the outer tie-rods attach to. Do a search on this and it will come up.
'83 5.8L TKO'd T-Bird on the bottle
'93 5.4L Mustang coupe that beat your mom's LTD
Last edited by d brune; 09-25-2009 at 11:13 AM.