Partner,
What year Taco do you have and how many leafs do you have in the rear?
If you have an 07+ with 3-4 leafs you should be fine. If you have an 06 like me that came it 1.5 then no... if you are getting this for sure you can wait til afet you intall or go and get the TSB before you have this installed.
Either way... get the TSB f you plan on hauling anything other than the sleeper IMO.
Search under the rear suspension TSB and you can look at how to get this done.
Good luck and make sure you post pics if you do get the sleeper.