Originally Posted by bracketracer
The vent hole is is where the base of the distributor starts to get wide on the front side its right under where the cap goes on, i also pluged the vent one day then it forced oil into the cap and made a huge mess. Thanks for your replys and help. John
I would agree with CARSAVVYCOOK, this is pretty typical of the lower bushing having worn out, possibly even the shaft where it passes thru the bushing.
Also, check the upper ball bearing for wear and inspect the lower part of the housing where it passes the right side lifter oil for a tight fit in the block and for cracks.