PCV

Picture from Chevy 1955 1st. 261 engine. This would have been the version from the factory.
Also there was an AC retrofit kit (CV and KV) that can be added to meet California Emissions.
It would be nice if you could add pictures of your intake manifold and draft tube if this is what you have.
A PCV system is beneficial for the life of the engine.
Attachments
PCV.jpg (125.53 KB, 267 downloads)

Last edited by buoymaker; 01/24/2021 12:40 AM.
"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."