NZ only has WOT switch if memory serves, so you'd have to modify it to fit an idle switch. The 3F TB is potentiometer, so that'd need an idle switch fitting too. With that in mind, I'd use a G40 TB!
If you use a K03 and a 3F cam, you'll get something that spools around 1500-1800rpm and starts to choke up by 4500rpm if the same combination on my 9.3:1 CR 1341cc motor was anything to go by. I'd try the 3F cam first, but budget to get something lairer.
As for power, if you run a 'turbo' cam and 6psi of boost with a K03, you should get around 130bhp once mapped up.
When it comes to injectors, G40 ones will be fine for the power you're talking about - however, you'll struggle to get an off-the-shelf chip for them. With that in mind I'd be tempted to go for 250cc/min G60 'greens' - you could use one of our generic chips to get you up and running, and it'd be okay for any boost level up to 15psi. Alternatively, stick with stock G40 injectors, and budget to get it custom mapped before booting it.
For gearboxes I think you'd be fine with an 8P if you still run stock rolling radius wheels - so 175/60R13 or something like 185/50R14. If like me you're running 175/50R13 then you'll want a G40 'box so that the overall gearing remains sensible. Once you decide you want more boost and more power, you'll want a G40 'box either way!