I also had steering fluid leaking in my 40th Anniversary when it had 150K miles. I flushed out the steering system and added about 20 oz or so of Lucas Power Steering Stop Leak. I am at 223K miles now and the power steering is still holding up. I keep checking the P.S. reservoir and it is full. No noise from the pump anymore. It is worth a try.
I have a used rack and pinion system on standby just in case the rack gives out in the car.