Sway bar install after or before?

[msg]

I am nearing the point of re assembly of my 66. Anything that was bolted together was removed. For the frame and suspension after breaking it all down years ago, parts were sandblasted and repainted. Some I need to just buy replacements for though. But I never had a sway bar on the front end and I am trying to get the right order of assembly down. Once I find a sway bar that will work with a stock height with power steering added I thought that installing it before I put the engine and transmission, cab and panels back on the frame would be easier. But I wasnt sure if it needs to be installed under a full load?