I'd have to see a picture of the PST parts... cant think of how a balljoint in itself would hold the front end high... unless it's not pivoting, in which case it's defective.
-------------------------------------------------------- from what I have read on the tubular arms, the slight improvement in negative camber gain while cornering is an after-effect of the increased caster the arms give by positioning the upper joint further back.
The reason many people only do the upper is that the lower offers no geometry changes, and very little weight savings, so isn't worth the extra cost. --------------------------------------------------------
On the PST boot not holding grease... It "looked" like it wouldn't hold grease, or will it not hold grease? It could be that these joints are they type with the long stud, which in effect gives a taller spindle, improving negative camber gain. If this is the case, they "look" funny, but are supposed to perform well. The boot wont travel down the stud to contact the spindle, but makes a seal around the stud. The tall stud does not hold the front end high. It holds the upper arm at a different angle. The spring between the lower arm and the frame holds the car up, so the problem would be in the spring, or lower arm pivots (bushings or joint).
If the kit also came with a tall-stud lower joint, this actually drops the ride height, by placing the spindle higher in its relationship to the frame pivots. It also is bad for bumpsteer, and is often used with the front-steer Abody, where it has the opposite effect on bumpsteer. A long-stud outer tie-rod may have been included to help correct bumpsteer. (hard to follow... sorry)
