You didn't put the year model of your car in the appropriate box,
so it's hard to tell if the car should or should not have the PCV
system. On a worn engine it can be more of a curse than a blessing,
however. Maybe you should get a new shift boot to keep the fumes
under the car!

By all means you can install a later crankcase ventilation system.
I suggest you look at a later model 1800 or amazon to see how it is
piped. One hands-on experience is worth a thousand pictures, each of
which is worth a thousand words.

Normal compression will be 130/140 psi or around 9 bar (if I calculate
correctly - trust the psi!)
--
George Downs, The "original" Walrus3, Bartlesville, Oklahoma