Will the standard box and power box interchange? What years/makes also fit?

Can you rebuild these units? Replacement units?

Thanks!

 

http://www.powersteering.com/products/ will rebuild your steering box with quicker ratio gears. This guy gets good reviews here.

You can also buy rebuild kits and remanufactured steering boxes from Rockauto.com. PS and non PS are not interchangeable.

ATSCO Part # 6529 fits many many vehicles (PS).

 

Will the pitman fit both boxes?

 

What model is the manual steering gear? I assume its a Saginaw but what #?