Seal replacement--or replace power steering gearbox?

Hello Gang,

Here's a question....As everyone here knows, I have a '68 Valiant 100 4 door sedan. I had the power steering pump replaced last year after it went. I seem to have a leak coming from the power steering gearbox itself. Is it an easy fix to replace the seals, or just replace the entire gearbox? I seem to go through about a 1/4 of a bottle of power steering fluid about every 2 1/2 to 3 weeks. When I had the power steering pump replaced, I had the upper pressure hose replaced as well. Any input would be greatly appreciated...Thanks again. Brian Carotenuto :(