Looks slick! Very nice.
Great news for your tall upper BJ concerns: They won't affect ride height!
Here's how I tend to breakdown understanding ride height:
I like to think that the springs and lower a-arm spring seats make up a sort of "pre-wheel ride height" or "spring oriented ride height."
And on the other hand, things like drop/raised spindles and extended ball joints make up what I like to call "wheel oriented ride height."
With spring oriented ride height, what you're really doing is bringing the frame of the car closer to the lower a-arm. Since your lower a-arm's lower ball joint can't get any closer to the ground during normal driving, you can almost think of the lower a-arm like the ground itself. Rock bottom! Your springs (and therefore the rest of the car) are basically standing on them. Using lowering springs is sort of like bending your knees to lower yourself.
Wheel oriented ride height is where ball joints, spindles, and even wheel dimensions come in to play. It's a lot less like bending your knees and a lot more like taking a step down on a ladder! Now let's think of the lower A-arm like your foot, the upper A-arm like your arm, and the wheel & spindle like a ladder. Your ball joints are just like rungs on the ladder. Adding an extended lower ball joint to your spindle is like stepping down to a lower rung on a ladder. You're lowering your entire body. We'll stay with this ladder analogy to talk about the different combinations of parts:
-Stock parts are like you standing halfway up a ladder. Use that height as a starting point when you imagine each scenario.
-Drop spindles are like you moving both your hands and feet an equal number of rungs down a ladder. You're your same old self once you get there, but you're just closer to the ground.
-Tall upper ball joints alone are like moving your hands up to the next rung without moving your feet anywhere. Your body isn't getting any lower so you don't have to worry about getting closer to the ground. But your arms are getting higher so you just have to make sure there's nothing getting in their way. Reach as high as you want and stop where it's most comfortable. Parts wise, we've effectively added height to the spindle.
-Tall lower ball joints by themselves are like taking a step down to the next lowest rung on a ladder without moving your hands from the rung they started on. Your feet and the rest of your body are not only lower, but your arms are now slightly raised in relation to your body as well. This means that taller lower ball joints both lower the car AND raise the upper A-arms in relation to the rest of the chassis. Again, we've effectively added height to the spindle, hence the upper A-arm movement, but this time the so-called spindle height was added below the center axis of the wheel so the whole car moved down too.
-Lastly, both taller upper and lower ball joints together are like moving your arms up one rung and your feet down one rung. There's a total increase of two rungs worth of distance between your hands and feet. But, you're still only one rung closer to the ground because it's your feet that dictate your total distance from the ground and not your hands.
I also made a sketch because I just like explaining these things as best as I can.
View attachment 91585
