That's a pretty good test right there. I'd call your work done. My biggest issues in my 80's were always feeling like the truck was responding in a delayed manner in long, swooping curves at highway speeds. It seems backwards, but I would have rather had a sudden lane change on a straightaway...
@Pick Don't worry too much about your mistake - I hear that about once a week, every single home center in the country has at least one person who tries to use a wheel as an anchor point for securing a load with a ratchet strap. Just don't be THAT guy!
When I got my stock 1996 at around 270k miles the body roll was scary. Original shocks and springs. I swapped in brand new OEM Tokiko shocks and the problem almost disappeared. Changing coils a year later for some with far less miles solved the rest of it.
I don’t really remember the four...