Flat Head PCV

Here's a good flathead question. I am running a PCV on my flathead. Will I also have to vent the crank case, or will the PCV pull enough to maintain a negative pressure in the crank case.

 

You need a way for fresh air to get in.

 

A stock type oil fill tube will provide all the air you need. If its an 8ba and you dont care for the side mounted tube you can install a 59ab intake on it with the tube at the rear location.

 

Thanks for the tips guys