7MGTE Build up suggestions 350hp - 400hp

[Supra Saiyan]

Car = Supra MKIII 7MGTE A/T (ALL STOCK RIGHT NOW)

I am looking for suggestions to my build. Here is a list of parts that I will be getting.. If you think the manufacture is crap or there is a better more reliable replacement out there. Please make the adjustment to my list.

I want to get 400WHP..
** M/T later this year for part of my weight reduction and speed increase plan (plus more fun) **
** Head gastket - DONE with metal gasket and APR bolts 75lb torqued **
** Head - Unknown head work was done in a shop by the previous owner, I do know gasket was done. 10k miles ago.. **

--Purchased--
Springs - Sustec gf210 (grip force)
Shocks - Koni yellows

--Need to buy-- (TOTAL $7835)
*Pre-Step* (Problem fixing) $285
Oil Drain plug gasket (4) - NAPA part #704-1076
Engine wire harness - 88 Turbo M/T or A/T (both the same)
Coil pack - 87-92 Coil pack (My'n has a melted clip holder)
*Step 1* (Looks, Tune-up) $160
Spark plug wires - NGK Laser Plat.
Spark plugs - NKG
Hose Kit - Black Silicone hose kit (water, heater, rad hoses, Vacuum hoses)
*Step 2* (Breathing) $680
Air filter system - Apexi Power Intake
Down pipe - Megan Racing 3in
Exhaust system - Custom 3in W/Dual 3in Muffler
*Step 3* (Handling, Safety, Looks) $1300
Breaks - Brembro OEM replacements
Rims + Tires - XXR-508 17x7 Front +25, 225/45/17 W All around / Toyo Proxes 4
*Step 4* (Power balancing) $2550
Air Flow Meter - Lexus AFM
Injectors - 550cc injectors
Fuel pressure regulator kit - Generic w/LIPP lines
Boost controller w/gauge - AEM Tru Boost Controller
Stand alone ecu - AEM
GET TUNED
*Step 5*(Power) $1000
Exhaust manifold - I6 Turbo Exhaust Manifold T4
Turbo upgrade - T04e 57 trim
Radiator - Fluidyne radiator
GET RE-TUNED
*Step 6* (Power, Final 400HP step) $1850
Oil squirters - Toyota OEM replacement
Oil pump - Toyota OEM replacement
Pistons - CP Pistons
Rods - Eagle Rods
FINAL RE-TUNE

All this should put me at 400WHP.. Though I am sure I tune to 550 safely. I don't want race gas though.. Flywheel and such are most likly needed.. Ugh.. I will research that and put it on my list.