Help Selecting the Right Shock

I'm trying to select the right shock for my leaf pack. I have the All-Pro Expo Leaf Pack so I know my extended length should be around 28.5"

I want walker evans and was thinking the part number 525-00-10 would be the shock I need. Can anybody confirm this? Thanks!

Here is a link to their parts and charts:
http://walkerevansracing.com/products/13-performance-25

 

Okay the one I am looking at is 29.5" extended and 19.5" collapsed. I know that my fully extended length when my truck is at full droop is 28.5 so the 29.5 is good, but would the 19.5" collapsed be too long. I don't want to bottom out. I have Timbren bumpstops so I know that helps since they are massive.

 

All-Pro sells Walker Evans shocks that are valved specifically for use with their springs: The universal shocks may work too. We are a dealer for both companies so let me know if we can help.