Good luck with that. I had a mechanic replace the rack only to have the power steering pump fail 10 miles later (which we both know was because they didn't fill the system properly). They put in another pump and that one failed two weeks later along with the 'new' rack. That was back in the first week of April. It's about to be July and I'm still trying to get them to pay up. They both refuse to admit it was their fault and refuse to reimburse me.
As for the two quarts, according to the service manual for the G-series transmission the capacity is 3.4 quarts.