Shock Length

[Cody]

Does anyone know the shock length needed for a 4" lift and 6" lift?

 

[95C1500]

these two shocks. If they don't show up in the boxes at the top just look for 88-98 ck and the 4-6" lift
http://www.roughcountry.com/shocks-n20-series.php?id=0

 

[Cody]

I currently have torsion keys and a add a leaf as well as Monroe Monotube Reflex shocks, just wondering if id have to replace them if i went with a 4-6"