I agree keep everything connected as it should be my last 260z had all of it removed in a feable attempt to suck more power out it by the last owner. Shouldn't have bought it but we live and learn to tell others not to make the same mistake.

The engine was driven Very hard as I was longer and dumber then and just got my licence by the end the oil pressure was very low and I'm sure over revving , poor maintenance and all that so called performance robbing stuff was a part of it.

Thank you Australia for your wonderful smog laws in the 70's

Since we know the pcv attaches to the block and works as a on/ off valve..There is a smaller hose that connects to the monster block breather.That upon quick inspection I believe to be a connnection for the vent side of the fuel rail.My question is when the pcv toggles on/off,that would cause a change in vacuum on that return-------Right?perhaps it helps ?Maybe?