Ok, here's the story.
We picked up an '88 convertible, and it has one of the old Cartech turbo kits on it. This includes:
- Turbo
- Water to air intercooler
- Rising rate fuel pressure regulator

What I have been unable to find is ANY documentation on this really - other than passing mentions. We're trying to find anything - a diagram, documentation, anything on it.

In particular, there's a vacuum line that runs off the intercooler that has come undone. I need to find its home.

 

Not sure about the kit, but to find your vacuum leak:

Rig up a connector to your turbo inlet and run that to an air compressor... I think that's a 2" inlet on the turbo? Might want to check that, but thread in a NPT quick-disconnect and run that to your compressor and blamm-o. Instant vac leak tester.

Just plug it in, watch how much pressure you throw into it, and listen for the leak...

 

I've got the original catalog for it somewhere. Unfortunately I'm moving and it's inaccessible. I scanned a page or two on here at some point, so maybe that'll hold you over? Feel free to message me about it if I don't remember.
The items you listed above are the major components. It also has a cool manifold that lets you mount a T4 turbo and clear the 6-port intake manifold. Using 91 (or 93?) octane is also required.