600 cfm will be enough for that engine.
There should be a diagram on the right shock tower.
If it's a carburetor version, there probably isn't a regulator.
Its either along the frame on fuel injected engines or in the carburetor
It should screw into the carburetor on the feed line.
Quadrojet
It should be a 700R4
7000lbs
2.8L 2BL 1984 Chevy Celebrity The Fuel Fiter should be located in the coupling between the fuel line and the carburator.
According to ElCaminoCentral.com 15 city and 22 hyway for the V6 3.8 engine.
To idle down your 1984 Chevy Caprice, start by allowing the engine to warm up to operating temperature. Then, locate the idle adjustment screw on the carburetor, which is typically found on the side of the carburetor body. Turn the screw counterclockwise to lower the idle speed, monitoring the RPMs on the tachometer until you reach your desired idle level. Finally, ensure the engine runs smoothly and make any necessary fine adjustments.
When you purchase a carburetor kit it comes with a full diagram.
How to you syncronize a 1984 honda prelude carburator?