360 oil leak at back of intake manifold

Dart......I have slept since then ..... I actually have a new spare in the box that was going on another project...Im going to have take a break and go look ...
I swear I m just like a little kid sometimes when is comes to taking parts out the box NOT noticing a gasket other than the O-ring but it makes sense . See that Line
about i have slept since then.... It always cost me money to go to school.....I never get away from it.....
Kind of like one of those times where I put something up so I could remember where I put it at.............

Yes very thin ....You are right