Can't do it all at once: what's your reccomendation for order of suspension upgrades?

i agree with post #13 and AJ.
Even when new, stock A bodies were under sprung, oozy and would understeer right off the road on big highway bends at even a hair over the speed limit.
For a safe enjoyable ride with a modern feel, assuming your suspension is in good stock condition
#1 disc brakes
#2 tires
#3 front sway bar
#4 at least .920 torsion bars
#5 good shocks
I don't think your rear springs have to be real stiff if you have good shocks as long as it sits at stock height or lower.At this level your car will stop great,handle with a more modern feel and allow you to push the car a little safely.