Removing 340 heads

Okay finally got back to this. So, I went ahead and tested compression on each cylinder to thinking that maybe I don't have to change the gaskets. Each cylinder tested out at 170 - 175 PSI. I take it that is where they are supposed to be and indicates no leaks requiring replacement. So my next question is would you go ahead and replace the gaskets?

At this point the only oil leaks I have been able to verify was the front and rear of the intake and the valve covers.

So you were thinking head gaskets for an oil leak? Or did I miss something?

If you have a leak, I would start with the valve cover gaskets.