stock 85 z28 TPI

After an expensive quote for custom headers I've decided i may as well go supercharged.

Im a newb with engines so i need a lot of direction.
Should i do some engine work before i buy a supercharger (headers, exhaust)?
Or should everything get taken care of when the blower is installed.

Can you recommend me a setup thats not too big/expensive.
I basicly wanna go to a shop, tell them i want it supercharged and let them setup everything, and then pay the bill.

Any direction/help is greatly appreciated.

btw im in Australia so everything is a lot harder