Power steering gear box rebuild kit?

[Hillbillydrums]

My power steering has never been functional, and i've swapped pumps. So i figure the gear box is the issue. And it leaks from the gear box so thats also a nice sign

I have a parts truck that i ripped the gear box out of. I'd like to just rebuild it, so when the time comes i can just swap them out.
Autozone sells 2 kits to rebuild it. Which one is necessary?

http://www.autozone.com/external-engine/power-steering-gear-seal-kit/duralast-power-steering-gear-seal-kit/21505_30168_0/
OR
http://www.autozone.com/suspension-steering-tire-and-wheel/power-steering-gear-kit/duralast-power-steering-gear-kit/21546_0_12266/

[Captkaos]

without knowing which one you have it would be hard to tell.  Did you look it up based on application?

[Hillbillydrums]

without knowing which one you have it would be hard to tell.  Did you look it up based on application?

When searching by vehicle, these are what comes up. 75 k10, 350 w/4bbl.

what are the differences in the items?

[Captkaos]

One is a complete rebuild seal kit and the other is a a gear major seal kit based on the description.