Eureka...almost. I found the line outlet line at the filter was kinked. I won't tell you my daughter's step-dad's name, but I'm embarassed to say that he's the Manager of Maintenance where I work. I guess those that can't do teach, those that can't teach supervise...
Now then, I am still not getting fuel delivery to the engine. After straightening the kink, I tried priming the system, about 20 times, and never got a drop of fuel. When I got the wise idea to blow air through the line from the engine bay to the filter, I uncoupled the filter outlet and got a healthy (or unhealthy!) spray of fuel. The line pressurizes out of the filter. I disconnected the fuel line in the engine bay where it first enters the bay, right hand side against the fire wall. I then blew air through the line to the filter outlet and got some gas and then good air flow. The old filter was probably the original. Could it have 'broken down' and passed filter media into the line? I hand traced the line to see if it had other kinks and found none. Could the original kink in the filter outlet (soft hose, not the steel tubing) be internally kinked? It looks fine from the outside. Am I not priming it long enough?
Here's the pictures of the mysterious doo-dad. Any guess what it is? I've sent them to the two guys already helping me with this problem, not really sure where I can post them to show everyone else...
Again, your help is greatly appreciated.
Alex