280zx turbo brakes and coilovers are a good upgrade. I say that, because it can be done with relatively little mods. I've seen some really scary adaptors for wilwood brakes, there's no reason that it takes anymore than a flat steel adaptor. the coilover conversion is pretty simple, then get the 5 position adjustable tokiko struts.

you need 3/8" spacers to fit 280zx non-turbo 14" wheels, but I think the turbo wheels might not need a spacer. You could get wheels with the correct offset and that would work too.

look to spend close to $2000 for everything.

get poly bushings too. expect to spend maybe $300 on those.

I have 200# springs stock would be 90# It really feels nice on good roads. Around my home the roads are crap and it's a little rough, but once i leave my impoverished state and go somewhere where the roads are maintained it's perfect.

I just went to nevada. went 80+mph in passes 8300 ft. but i burn lpg and your results will be different :)