I guess it all depends on what resources you have available to you.
I have a full shop that was built for building road course racing cars, Bridgeport mill, mig welding equipment, a surplus of 6G72TT parts and enough scrap tubing to build just about any exhaust/ic set up.
I would run a 6G72TT front manifold on the passenger side, stock manifold on the driverside, cross over tube with flex underneath to passengerside, collector for a t3 flange, mount internal gated turbo, v-band outlet to 2.5 downpipe to 3 inch exhaust...
oil cooled 50 trim turbo, dsm 450cc injectors, walbro 255 pump, vr4 injector resistor pack, vr4 fuel pressure ref, vr4 ecu on stock montero harness (still verifying pin outs but 3kgt guys are using reflashable montero ecu's in their 3k's)
then a simple SAFC and wideband for tuning.
Most of the above, i just have laying around, looking for an excuse to be put to use... I have a budget of $1860 for this project and I intend to come in well under budget, i'll keep up with this thread as I go.
btw, 6G72 will bolt in, but the coolant routing and intake manifold has to be messed with. not sure the driverside turbo would clear the brake master and booster either.