Help me figure out this smoking issue

Just installed a 93 Cobra intake, new lifters, and new pushrods. I replaced the intake gasket with a Felpro 1250 using RTV for the end seals.

When I started the car, its running a little rough, I think I have a small vaccum leak somewhere. After idling for about 5-10 min, it started to smoke from the exhaust pipes.

I checked and it doesnt smell like burning oil, just smells of exhaust. The smoking will be faily consistant for a few min, then it will lighten up some. I also noticed that sometimes it seems to come more from one tail pipe than the other, then it will alternate.

Oil is clean as is the anti freeze so I dont think I have a gasket issue.

Also, does not smoke on initail start up, just after a few minutes of idling.

Any ideas?

I went out and checked my plugs. These reading are only after sitting and idling for about 10 min with a few stationary revs.

Cyl 1 & 2 look good,
Cyl 3 & 4 look lean ( electrode is very white)
Cyl 5 & 6 concern me. Both were wet with oil on the electrode and threads
Cyl 7 Looks lean
Cyl 8 Looks good

Why would I have oil on the spark plugs of cyl 5 & 6? all I changed was the intake and I didnt have this issue prior to the intake swap.

Someone tell me its something that wont require removing the Lower intake again.

I checked the lower intake, there is a baffle, I rememberd to put the mesh screen under the PCV valve also.

If it was a PCV issue, wouldnt it affect all the plugs?

I am thinking maybe a lower intake gasket issue since the 2 plugs with oil on them are side by side.

Ok, I went out and pulled the PCV and the hose. The PCV valve has a light (very light) oil coating on the outside nipple where the hose attaches and the interior plastic part.