Gate keeper

Something short about me. I helped out my Father in Law with his fence business for almost 30 years until he passed. Later I started my fence company. I can't keep up.
Why I'm here. At some point I bought a 1986 GMC C6000. It's a running rust bucket I'm working to restore. So far the rodents have got more use out of it than me. Problem is the Hydro booster. I'm here because I hope someone can help me. Haven't even drove it yet. I'd just start it and move it a little to keep it happy. One day the PS fluid began running out from between the MC and HB flashings. Figuring it was a seal, I replaced it with a remanufactured one, which also poured fluid. Since then, I've replaced it 2 more times in a row. As soon as I fill it and start it, it pours out. I'm either doing something wrong or these remans aren't worth a damn. I don't know if there is limiter valve in the pump that has blown out or something else. Not sure what to think on this one, but I could use some old school advice. Thanks. Dave
Now if I could only figure out HOW TO POST MY QUESTION, it would be great.