Dad had a 70d JD and had oil leaks that the dealer could not seem to stop so another dealer suggested a line from the valve cover to the air intake. The tractor ran for many years after that with no oil leaks.
When I worked for a MM dealer we took a hose from the valve cover to the air intake manifold to keep the oil leaks down. It worked very well.
Usually on a Perkins they have very little blowby and have found when they have a lot of blowby the engine needs repaired.
With that said and you may not want to spend money on repair then why not return the blowby to the air intake? Just don't use a huge hose/line to do so.
Just a warning --- a diesel engine is compression ignition and will run on oil or fuel that enters the engine thru the air intake. If the engine gets enough "fuel" it can run on that fuel and you will not be able to shut it off by normal means. This is what is called a runaway diesel. And why two stroke Detroits have an emergency shut off, which consists of a flap that closes off the air to the blower.
