Power steering gearbox - blowing fluid

[Allen]

I was so excited about having an NOS power steering gearbox in my stash of parts and had it installed during the restoration of my Nova. It had a good tight feel and looked great. This morning, while out for a drive, it started blowing fluid out the bottom of it around where the pitman arm attaches. I don't know if it had a dried up seal or what happened.

Is this fatal to a gearbox, or something that can be repaired? Will I have to pull it to have it done?

Thanks for any suggestions. I'm a bit bummed out about it right now.