Ok, so in an ideal world i would like to get around 500HP + or - out of this combination. I also have a list of aero and suspension modifications as that would be attached to this as well. But for now Engine first .

RotorSports Racing 13B TT Stage II rebuild $3699 ( agressively street ported )
Trust Greddy Sus. Turbo Exhaust Manifold $ 1105
RotorSports Racing RX7 Fuel System Upgrade Kit $995
Turbosmart 45mm Pro gate $589
Turbosmart Dual Port BOV $329
FEED Compression Tube Throttle Elbow $355
RE-Amemiya Level Man Intercooler Kit $3250
RE-Amemiya FD Pulley Kit $528
RE-Amemiya Sports Catalyzer $1137
Stillway Oil Cooler Set $1070
Greddy Full Auto Turbo Timer w/ harness $120
Trust TD07-25G turbo (still looking for a price on this )
RE-Amemiya 2mm super apex seals

 

assuming this is a FD?

 

yes she is an FD

 

I'm not the guy who can tell you whether that will reach 500 or not. (It will depend greatly on tuning, octane, and level of boost)

I would suggest you get diff braces, upgrade the motor and diff mounts, and maybe an upgraded powerplant frame.

Dave