rear spring u-bolts

45 lbs :eek: no way!!... 1/2 in fine thread u bolts I would start with 75 lbs,drive the car re torq to 85lbs.Then recheck after a week and and torq to 90 lbs...
Some of those 4x4 1/2" U bolts require 125 - 150lbs
You WILL crush the housing tube.

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That's not warn it is crushed. You can see the crush on the inside of the tube.

Remember that 8 3/4 are formed flat stock metal to make the tube NOT extruded pipe

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