Couple of idea's
*get a 32/36 weber jetted to the 4k- carby$free-$150, weber adapter plate-$50, jets $20, air cleaner-$depends what you want.
*extractors-$50-$200
*2" or 2.5" NO BIGGER exhaust-$80ish if you have a mate, $150 for shop to do it
*ae86 or corona xt130 front struts for bigger brakes and more variety for inserts. i.e adjustable, shorter stroke etc etc $depends on what you get with the package
*suzuki sierra rear shocks with about 6kg springs-shocks$120, springs-$50-$300
*xt130 lower control arms for a little bit of negatice camber-$50-$200
*heavier/bigger swaybars-$500-$600 for front and rear
*ae86 powersteering arms or if you have a welder cut your own. -ae86-$100-$250, cut and weld$free
*cam, valve springs and rebuild the head.-cam regrind-$90-$200, valve springs-$100-ish
*full service and check on the engine-$what ever it costs, it'l be worth it if you do it right
Thats just some estimates on prices and just some general idea's that i would do.
Cheers