PCV---Breather or connect to air cleaner

It is my understanding the pcv can be connected to either the power brake or pcv port on the carb, since both are full manifold vacuum. They can not or should not be shared. So if you are not using the power brake booster - I do not see a reason on why you can not use the rear power brake port

(Warning - Joke ahead...)

Technically you could hook it up to your nose and breath deep. (Something Tommy boy would say....)
:rofl:

Seriously speaking now... the front port has a constant and consistent draw on the PVC valve which has a certain specific weight believe or not. It just doesn’t properly work at the rear of the carb.

On the market somewhere, there is a highly tunable PVC valve that helps out a lot. A few members here have them and report good results to problems they never thought would happen with as or poorly operating PVC.