Well I followed the steps many of us have gone thanks to BrianBrave. I used an Afco surge tank with a 3/8" NPT bottom outlet and 1/4" side inlet. I used brass fittings from Home Depot and a Mr. Gasket Radiator cap that has a water temp gauge on it (pretty nice if you ask me). Took me about an hour to do including draining the stock surge tank. IAT's still get high when boosting hard but come back down a lot faster then before. While cruisng temps stay around 15-20deg higher then ambiant compared to 25-30+ before. As stated by others, the IC circuit coolant in the stock tank is cool to the touch right after a 'spirited drive'. Here are a few pics.


I need to make a bracket to move the tank over towards the center of the car so I can re-install my Needswings CAI (modified LET intakes for now).

 

Sweet, looks nice.

 

Thanks! Its sort of a temporary location. It needs to move about an inch to allow the silicone tube to pass thru the radiator support for the Needswings CAI.