To answer a few questions:
Turbo used is a TD04L from a 2005 Impreza WRX.
Pete built everything up, but another company did the machine work and race balanced all the componants.
For my mods and progress, you can view my car thread here:
Click here
To list a few:
Pauter rods
Ross 74.5mm pistons
1.2mm Speedvision metal headgasket
Cruise valve springs
Dale Mild steel manifold and downpipe
Autofixed exhaust
Aliminium half sized radiator, ebay special
TRD thermostat
TD04L turbo at 1.4bar