probably my steering box is running witouth a leak for the last 30 year :D
but, as it was sitting away from a car for a while (I think 3 o 4 years) I decided to rebuild it with new bushings and o-rings
the steergint pump works great also. I has been used in almost all 70's and 80's brazilan cars (as gm, ford and dodge) .. thus, its easy to find spare parts.
I think the brazillian box looks to be a better setup for the steering coupler, sort of like what the 70's dodge trucks came with. they never seem to have problems