What gets tightened with suspension loaded?
 

Finally finished with my 9" install, just need to check the pinion angle. What gets tightened with the suspension loaded, and what can be tightened while the car is still in the air? I know the control arms and sways need loaded, but what about the TA, shocks, and watts link?

I snug everything up, but torque everything with the suspensions loaded. Especially if you have anything with poly bushings. But torque everything with the suspension loaded same with pinion angle

I'd also tighten the sway-bar end links with the suspension loaded .

Does the suspension have to be loaded to set the pinion angle?

Yes + or - 2 degrees is the optimum range

We always recommend doing everything possible with the suspension loaded. Short of actually replacing components of course. Snug everything down enough to hold it together to get it on a drive on lift or ramps etc. then torque everything to spec and set your pinion angle. This "clocks" the bushings into proper working range so you do not end up with binding and squeaking issues.