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The absolute bare bones +T

Dude, you just need to READ. Lots of threads.
If you don't know this bit then you are missing a lot of other info you need to know. Read so that you don't get 50% in and get stuck because you don't know what you don't know.
I'm not picking at you, doing things like this means you are in for a fair bit of trouble.
 
Step 6: Intake modification (added here due to a character limit when attempting to edit original article)

The most important part of modifying the intake is to take stock of everything in the engine bay that relies on vacuum from the engine and make sure that those things don't receive boost. There are certain parts (especially the brake booster and the PCV) that REALLY don't like it when they go from their normal life of always only having vacuum or atmospheric pressure and suddenly they get high pressure air.

The easiest way by far (and usually the cheapest) to make this all work right is to photograph the bay of the turbo car you're scavenging from and pull everything that connects to the intake and all the nipples and check valves you can get your hands on. Even if you don't end up using it all it can act as a template to cut what you end up using.

Anyway, on to the goal here - the way you prevent boost from hitting a component that can't handle it is one of two ways:

1) You reroute the hoses to the intake side of the turbo.

2) You splice a check valve or check valves into that hose so that it opens when given vacuum but closes in boost.

With the brake booster it already has a check valve built in so that it never runs short on vacuum. But it's a very good idea to add another check valve inline on that hose. That way if one breaks, you don't suddenly lose power braking. You're probably doing this on an old car with old parts. Add some insurance.

The Idle Air Control motor (IAC) and hose setup doesn't technically require adapting because it routes air to both sides of the throttle plate and doesn't actually feel much of a pressure differential and doesn't have a diaphragm to rupture.

The PCV hoses can also be extended. Whatever you do, do not leave the small or the large PCV hoses exposed to boost. And if you extend the hoses (recommended) be sure to use hoses that can survive vacuum. Don't use heater hoses that can collapse under vacuum, especially when hot. You can pull all this stuff from a junkyard turbo car. And if you have to use new hoses use the same internal diameter. You want the vacuum and flow rates to be the same as what Volvo wanted unless your +T is going to be putting out a huge amount of horsepower.
 
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