Need to run a custom turbo set-up like this using your stock exhaust manifold.
http://www.youtube.com/watch?v=xSB2uvlOOtQ
Prices;
$60 in the turbo, $30 in pipe, $100 in the intake and $75 in the carb. Maybe another $50 in misc pieces. $100 in the exhaust."
Thats a total of $415.00 That is not too much for the power increase as compared to a normally aspirated engine.

Or a turbo set-up like this,which BTW ,will be the simplest set-up & should cost less for the complete used set-up,then have a downpipe made.
Still useing your stock exhaust manifold to hook up to the turbine housing of the turbo.
Can also use stock/modded intake manifold,to accept the 3 bolt flange from the compressor housing,instead of the two bolt stock carb studs
post #4
http://www.turbobuick.com/forums/before-black-non-sfi-tech/312778-301-turbo-stuff-sale.html

I have said it before & i'll say it again,If I would have turbo or supercharged my L 6 first time around of performance mods,,, I would have never wanted to try anything normally aspirated .

The Pontiac 301 V-8 turbo set-up or Buick Regal V-6 set-up w/quadrajet carb,will be the best/easyiest thing to due for your L6.
It will far out torque & out perform any simple 4bbl carb,headers,camshaft install you are thinking to install,period.

Just need to save up a few dollars & take that minimal plunge to get into the boosted world.

MBHD


12 port SDS EFI