personaly i wouldn't use metal brackets, i would just use screws/bolts with a washer.
idea being if you catch it the mudflap is ripped off, rather than the bumper ;)
http://www.pistonheads.com/classifieds/used-cars/subaru/impreza-wrx/subaru-impreza-44s-wrx-turbo-awd-2002/4548051
summit like that, £1000 trade in leaving £2500 to find. by the time you do the cams, flywheel then look at brakes, suspension etc etc etc
just doesnt make sence to do anything much to a none turbo. you can do all of that and still be slower than a standard wrx
GF8 is a wagon/estate
that model code applies to various versions from what i can tell, but all wagons. Engine code applies to just a V2 555 sti saloon though.
As said, any pics?