I'm having oil dripping issues on my wife's 60 super 88 394 motor. I was thinking of adding a pvc and baffle to one of the valve covers. How hard is it to remove the tube and plug the hole while the engine is in the car? Also what does everyone use to plug the hole?

 

I moved your post to a new thread. Hopefully someone can give you some pointers.

 

You can plug the hole with a rubber plug or knock a freeze plug in it. Google pcv for a sbc road draft tube for some additional ideas.

 

Cummins diesels in Dodge trucks had the issue of people not liking the drips in their parking areas. They added a plastic bottle with air holes near the top and you empty it every oil change.

 

Keep in mind that that blow by has to go some where and unless you seal off the oil filler cap (it's vented) and rout a pvc valve to the carb or air filter she will still drip though in a different place.... Tedd

 

It appears that Oldsmobile changed the crankcase ventilation in 1961. The 1961 service manual shows the standard "road draft" system to originate in the right rocker cover instead of the rear of the engine. Apparently there was an optional PCV system which also originated in the right rocker cover and terminated in an adapter plate at the base of the 4 BBL. carburetors. This system also provided an inlet breather on the left rocker cover to vent that side of the engine.
The two systems' descriptions can be viewed (with diagrams) on page 2-4 of the 1961 Oldsmobile service manual (second edition).
A donor car might be helpful.

Removal of the old tube should be straightforward. Many were attached with two bolts. As suggested, find an appropriately sized plug or fabricate a cover to attach at the flange location.

 

Thanks for the tips I'm gonna try to remove it soon

 

Half the car emissions came from the road draft tube.

Cars delivered in California were required to have a PCV system in 1961. New York followed; it became a Federal requirement in 1964. This should give you an idea where donors would be located.