What are the u bolt torque specs ?

Howdy, I am trying to install some sumo springs on my 22 TRD offroad Tacoma.
I wanted to know what the torque specs were for the u bolts.
Been trying to look online some says its 52 ft-lb Others say its 73 ft-lb or 40.
Not sure what it is.

Also can you lift a Tacoma from the back where you install the tow hook ?

Also i have to Lift the truck to remove the u bolts.

 

My data says 52.

 

I lift from the rear axle placing stands at the rear of the frame then let the axle down. Easiest/quickest for me to lift once and get both sides up at the same time

 

This is from the actual FSM.

52 ft-lbs

 

You don't need to lift anything to install the Sumosprings in the back. If you have a creeper or don't mind laying down you can loosen the U-bolts swap out your bump stops and tighten everything back up.