Tall upper ball joints VS tall spindles?

[Dazze]

I,ve look at this forum, and try to read up, but i can't seem to find an answer to this question:

On a first Gen F-body (and other cars) when you get a taller spindle installed, as i understand it, they usually are about 1,25-1,5" taller than a stock spindle.

When you get a tall upper balljoint installed, why only use 0,5" taller balljoints?
Would it not be better if the balljoint were as tall as the "Tall spindle" = 1,25-1,5" to get the same result?
Not that i have seen any that tall around... but i've seen 0,9-1" taller balljoints avilable.

Am i missing something or what???

Just trying to figure out the most cost effective way to get my -69 F-bird to handle, without rebuilding everything.