318 stalls in Drive

iScamp said

Let's start with the vacuum leak. That's the simplest. Could there be a leak on the underside of the intake, in the lifter valley? How could I check for that?

I'll agree patience is paramount to success. Knowledge helps, too.

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My guess would be that if you had a vacuum leak coming from around the intake Port between the head and the manifold that it would also be drawing some sort of oil or something from under the lifter Valley and making your plug all oily? And it would likely happen in just one area and would be falling out plugs I think? Does that make sense?