Have got issues with my steering box. Binding up.... can these be reconditioned?

 

Yep, Redhead sells remanufactured steering boxes, if you can turn in a rebuildable core. Welcome to FTE btw

https://www.redheadsteeringgears.com

edit: I see you live waaay far away. It would probably be prohibitively expensive due to shipping costs. You may want to try this yourself.

 

Yes, they are fully rebuildable. A reputable steering/front end shop should be able to sort it out. Assuming its from a Factory RHD F100, I believe the similar era Falcon uses the same box.