Need a port for PCV.

RustyRatRod said

The brake booster should be routed to the intake manifold. The carburetor is for the PCV valve.

Click to expand...

Yup. In this photo "stolen" form here, draw a mental line from the right hand secondary bore to the far top right manifold bolt hole. "That hole" in between is 3/8 pipe thread, going into the intake vacuum / port runner