If you don't need heat these headers might be a good place to start. Sell your 3LDZ and pick up a high flow k27. Add a larger intercooler and you can add a 1 bar spring. Most of this stuff can be found used in good condition here on the pelican board as everyone seems to be continually upgrading their cars.
82 930 Pearl White 3.3 964 cams, K27 HF, Kokeln, fuel enriched, IA fuel head mod, wur mod, crankfire, 2X plug, Aase worked heads. 1bar, GHL, zork, 23/33 bars, low, loud