okay.

if you choose draw thru you will need to rebuild the turbo with a carbon front seal in the core to stop the engine sucking the oil out of the core when the throttle snaps shut.

blow thru is a cheaper option, you can just box a weber and be done with it after jetting. you could intercool it then, or just run water injection.

i would recommend you head on over to GTRYDAZ or the MRT forums and search for a TF035HM (or just TF035) off a subaru forester GT. cheap as chips, water cooled and internally gated with 8psi stock. i had a pair delivered to my door (canberra to perth) for $300 total. just make sure you get one with ALL the water banjo lines and oil return pipe fitted - subaru charge over $260 for these two bits alone - EX JAPAN.

leave the engine stock for this kind of boost.

if you MUST use a J pipe, there is nothing available off the shelf so to speak - all you are doing is using 2 or 3 exhaust bends to go fro the underside of the exhaust manifold up the the base plate of the turbo.

you'll need to drill and tap the top of your sump for the oil return and drill and tap on top of your oil filter block to provide oil to the turbo under pressure. for the water lines you can just tee off your heater hoses.