Bingo white smoke!!!
Dont think any oil has been burning though I could be wrong.
You think oil splash from the valley area (oil fumes) is getting sucked up and into the intake?
If the manifold was leaking wouldnt that create a lean condition?
Going to clean everything up and put it back on next week some time.
What type sealant should I use, and how much? I assume it wont hurt to apply it liberally.