Hi Martice,
I think the 86' 944T suspension/brake parts are the best for the supers conversion because it's got the advantage of early 944 (better fit a beetle), narrow ally rear arms and of course 4-pot calipers and big rotors.
According to Michael Ghia's webpage, the 944 spindles can be modified to fit the VW 15mm ball joints. I personally think that it is better to use Kerscher 17mm ball joints as it is less hassle and safer.
Bump steer kit allows you to insert the tie rod end from below of the steering rather than from the top. The kit consists of a pair of bushes with taper inside to match the tie-rod ends. You need to drill out the old taper from the steering arms and press the new bushes in from below. Then you can install the tie-rod ends from below. It seems that not many people market this product these days. I saw it in the catalogue of German Car Company (UK) few years ago.
Take a look at Kerscher website for the E-brake adaptors
http://www.kerscher-tuning.de/cgi-bi...04298583129069
You better change to a stiffer front sway bar to reduce oversteer if you use the 944T rear sway bar.
Tim