360 oil leak at back of intake manifold

Dano...roll pin has been remove.... no I did not mock up the intake but do know a buddy of mine was trying the cork pieces (dry) on the front & back of the china wall and it did not
make up to the heads....so I knew that was not going to work as I used Permatex right stuff when putting it together. I have been busy doing the things I have to
(still work some for $$$) to get to do the things I want to. I am sure I am singing to the choir as Hotrod money somehow keeps depleting.....and we know how this happens. So I will be back on the Duster this weekend.
I sure do appreciate all the input from everyone. I will take a look at the distributor as well. I know I will find it but grabbing some been there done that from a group of old pro's is a great start.