On an intercooler which requires a valve cover breather the intercooler does not have the front PCV drilled, the back hole is drilled. This is because the intercooler core is to big and in the way. If you are using a stock L67 throttle body there is no port to connect you metered air supply to your front vale cover for full PCV operation.
The following pictures show how to tap into the throttle body and connect vacuum line from front valve cover to throttle body.
Tools
1. Drill
2. Drill bits
3. 1/8 npt tap
Top of stock throttle body
PCV port is on the upper right
Brass plug we are going to drill out
Plug drilled out
Tap the hole with 1/8 npt tap. Blow out all the chips and screw in fitting.
Picture showing my front valve cover extension and hose connecting to my northstar throttle body. You would connect to port you just drilled and tapped.
**Note for L32 throttle bodies**
You do not need to drill the throttle body. Cap nipple on back of Gen 5 supercharger pointing straight up (it won't pass through Intercooler) and connect that hose instead to front valve cover. The stock l32 manifold will need the 1/4 hole drilled in back. You will not have to do anything to throttle body. PCV will be fully functional.
