The TB wont care if it's turbo or not all it's doing is adding fuel for NA it will just add less fuel.

That's my friend Jon's capri. We got the bottom end done by a friend who's an engine reconditioner, he also did the valve guides and seats but I ported it, built the head and we installed and tuned it on the road before the dyno session. The spkie is because the exhaust is too small (2.25 inch) and chocking the topend power...

Here's the link to my capri http://www.retrotech.co.nz/rides/mk1capri/capri/capri.htm we have recently moved servers and just about all my pics and pages got lost so I have to upload them again...
You can see the dyno run of the supercharger setup I did and a pic tho...

I've already mounted the VG30-DET and box in my capri got the intercooler in and with the turbo and injector upgrade it should be an easy 400 HP