Guy.
All I can really say is search. If you want to see what other people do, check out:
www.240sxturbostyle.com (my website... updating, so it's kinda ugly right now)
www.boosteds14.tripod.com
and
AceInHole's website. I don't know it offhand, but check his profile for it.
A t25 is too small for a 240sx.
JGS has the cheapest manifold, but it's a weld-it-yourself.
330cc injectors aren't readily available. 370cc are. 95-96 300zx, and on Ebay under sr20det injectors.
Nix the Vortec FMU, because the JWT ecu will supply the fuel, and no, the stock ecu won't control the injectors, and you'll run like hell.
ACT clutch. Stage 2 for your power requirements.
You won't need a boost controller if 6-7psi is your goal, because most turbos from stock cars are right around there, preset with the internal actuator.
We don't get triple pillar pods, so don't search for one too hard. You can get a dual and a single though.
AFC is once again useless. JWT will tune the ecu very rich already.
2.5" downpipe to the front bumper? Huh? The heat will be so tremendous there, it will melt things, sound like ass, and look retarded. Just mate up the downpipe to the exhaust.
-Jeff