I was actually thinking about doing a post like this based your thread Geoff. The information is all there just scattered across 3 pages. At least he didn't make an ad for the Classified section stating he did all the work.
To do a full alignment on a Trooper takes well over an hour depending on what needs to be adjusted. If it's really bad I wouldn't be surprised for it take over 2 hours. Even doing just a toe alignment takes around 30 minutes.
For caster to make steering stiffer you'd have to make a very large adjustment. I've moved caster more then 4 degrees on several models and never felt a difference in steering effort. I would guess your new steering links are just a lot tighter then your old ones.