Replacing rear trailing arm question.....

[jpl2407]

I have the need to replace the rear trailing arm on my 2003 base model. It seems pretty straight forward, and, instead of paying the dealer an hours labor to replace it I figured I would take a Crack at it myself. I ordered the arm from pelican and, also the bolts that I will need. My question is about reassembly, does the suspension need to be under load when the new arm is fitted and the bolts tightened, or can it be done with the car on jack stands with the suspension hanging?

Regards

Jake