oil and smoke come thur vent tube on valve cover

[TTA984]

Oil and smoke comes thur pass side valve cover, not at idle but around 2000 or higher rpm. Drove it down the road and a lot of smoke got inside car and the oil had blown on the firewall and the engine. Any clue to what is going on?

 

[1970gsx]

Headgasket, cracked piston or rings is my bet.

 

[TTA984]

Headgasket, cracked piston or rings is my bet.

I am going to get it diagonosed,I have had the car for almost a year and every 200 miles or so I would have to add a little anifreeze or water in the coolant tank because it would lose just a little, it would not leak out, This could be an indication that the headgasket was getting ready to go out. Another thing when the car was idling it would have a sound like it was sucking air. Never could quite pinpoint where this sound was coming from. One of the first things I did when I got the car was put the right ac delco CV893C pvc valve in it.