Haven't used the PST ones but I have a set of Hotchkis ones on a B-body that have the same heim joints. They are a pain to set the alignment since you can't adjust them when they are bolted in (they updated the b body design last year so you can adjust them on the car but the A body ones are still the old design) but once the alignment is done they are good. More maintenance than bushings since you have to make sure they are clean but it makes the front firmer.
Be careful with the drop spindles, I don't think they work with the brackets on Baer brakes. The ones I've seen are only good with wilwood setups.
