Thanks for the reply. Would you feel the same about the rubber gaskets on the ends?

Also, before I pull it apart, is there any way I can absolutely be sure it is the intake that is leaking? I used the 1/4" bead method putting it together and ran it for 3 hours on a test stand. (Several heat cycles). Then I installed the motor and worked on electrical and body. (This took me 4-5 months). This is the first time I've brought it to temperature since being installed. And it leaks.

I followed the leak and can see that it seems to be coming from the front right corner nearest the distributor. I've looked to see if maybe it could be a valve cover and can't see any signs of leak. But I'd hate to blow a weekend pulling it apart again only to find it was something more simple to fix. Is there anything I can do to test to verify this is the source of the leak?