Emissions?

You know how they--the factory vented the gas tanks before 1970's, they just had an open vent hose from the gas tank--no kidding.

The engine doesn't even need a pvc valve to run right, doesn't hurt and might help stop an oil leak but many engines--even mine--has zip.

Now your state might have inspections, if so you got major work to please them, so dumb,imo