Well, it's my turn to ask for suggestions..

Rags in the intake are possible, however, I painted the intake hemi orange and it sat in my house for a couple of week. When I installed it, I specifically examined the all the ports to be sure no "crud" made it into the cylinders. I'm having a hard time with the exhaust being plugged, because I wire-wheeled the manifolds, cleaned them, removed the heat flap, totally examined the Y-pipe pieces that I cut to use as down pipes, used new 18 inch flex pipes that connected to almost new glasspacks that I held up and was like looking through a straight pipe.
I do have oil pressure, but I just have the dummy light. It goes off immediately. I have plenty of oil on the rockers and gets there immediately.
I'm truly thinking it's a faulty cam/chain or something with the valve timing. I have air, fuel, great cylinder pressure, good ignition timing, and most other components that worked great with the 318, leaving me with basically only valve timing left. I must go here next...... If I can't find it in the valve timing (I will try a different cam/chain if needed), I'm thinking I will have to pull the motor and totally disassemble it to find what is going on. If this is the case, I'll probably throw the 318 mag in there because I have limited time, and winter is moving in around the corner.