Gday guys n girls. im lookin at fitting 1 of these add-a-leaf suspension leveling kits to my 99 LS Blazer...my question is how do i determen if i need a short 24'' leaf or a long 36'' leaf to add in? all advise is hugely appreciated

 

24 is what I've always used

 

I just ordered these today.

 

Nice, pretty easy to do