The flat 1” tall ball joint spacers will move the UBJ down 1”, and in turn raise the upper control that same amount. It’s just a different way of adding faux spindle height, but if you add on a .5” or 1” taller ball joint, you raise the upper control arm that much too.Not picking up what your putting down about being stuck with stock height ball joints.
And yes.. driving the Cutlass already with hydraulics and all the extra weight in the trunk makes for some driving excitement already. Adding even more changes to the front end is always a risk/reward process with hydros....so appreciate the insight for sure and will look out.
A 2” height increase at stock ride height will be extremely close to the upper control arm mounting center, and will cause radical camber changes when the suspension cycles.
My previous setup with 1” taller units caused close to 4 degrees of negative camber gain in 1” of travel because my UBJ was above the control arm center height.
Short answer: you risk being above the center of the upper control arms arc of travel, causing radical camber changes in a short distance with the flat 1” spacers and taller upper ball joints.