Setup for my D series

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Ok so far this is what i have in mind:
Garrett T28 turbo with internal wastegate.
GReddy turbo manifold/ebay cast iron turbo manifol.
OBD1conversion with chipped P28
Ebay intercooler and piping/Good used lot
BOV
RC Injectors and fuel pump.
Custom Exhaust system and dump pipe.
Upgraded rods - maybe eagle...
Good Tune for street.

What else is ther to be looking at so i can boost my D series engine?

Yep like Fo55il said. Dont go with the ebay piping. It wont fit at all, had a mate who had issues. The china intercoolers do the job fairly good tho, just get that and while your getting your exhaust setup made custom, get the guy to make 2.75 inch mandrel bent intercooler piping setup done at the same time.

BOV - as fo55il also said, not necessary. BOV's are good to keep the backforse pressure pushing back through the turbo (flutter noise) this isnt that great for turbo's over time. But at the PSI you will be running it wont cause that much issue. To be honest Flutter noise sounds better than BOV anyways and its legal.