[SunSoaked]

The mystery has been solved! A bit of a head scratcher, but it makes sense now.

I pulled the intake off last night in preparation for the efi swap. This is what I found.

My first thought was how the hell could I have put two gaskets on? Impossible. I only had one set and I'm not that stupid normally. After staring at it for awhile, it started to make sense.

The gaskets delaminated and shifted causing the intake ports to leak. The cylinders with the fouled plugs coincided with the intake runners having an oily film in them.

Pulled the valve covers and the valve stem seals are just fine.

This was likely caused by my failure to follow directions included with the Edelbrock intake gaskets. It says to apply Gaskacinch gasket sealer on the head side and a thin coat of rtv around the water jacket ports on the manifold side.

I did NOT use gasket sealer. However, I did not expect this to happen.