Well it depends on what you're doing doesn't it? If you're running stock UCA's and bushings then you can't count on a ton more caster than that anyway and you probably don't want more than a -.5° of camber. For a lot of these cars lowered one inch and running those specs isn't that unrealistic.
More importantly, it's about the difference between the A-body spindles and the F/M/J spindles. Yes, it would be better if someone ran the comparison numbers with the camber at -.5° or -1° and and between +3° and +5° caster for those of us with more radical set ups. But those of us with more radical set ups should check our bump steer anyway right?
The absolute number and the difference between the spindles are two different things. If you're considering A body vs FMJ spindles, then it's the difference that you have to consider. And the difference between the spindles is small. Yup, there will be changes in the absolute numbers with the alignment settings and even more so for the ride height. And those absolute numbers are what you'll have to deal with if you want to minimize your bump steer. But if the difference between the spindles is small, and we're talking about picking which spindle to use, then the difference is what matters.
