From the OP
"The engine has a slight amount of blowby and it comes out the breather on the passenger side. I want to plug it up but keep the breather look"
Not to pick nits, but....
The PCV is the best answer, only if you are trying to maintain the period look with the valve covers and breathers would I consider omiting the PCV. But you still need to vent the gases. Only way you are going to stop the fumes is with a PCV.
Maybe fit a PCV valve into the breather then add a hose to vent gases to the intake.