Update and solution.
Well, I pulled the tank again and it was as big a PITA the second time. I replaced the hose from the tank to the hard line, although it looked fine. I blew air forward from the LP to the open FMM, and air went through, but should have been easier. Since it was such a mild day I thought I would check the fuel filter manager to see if there was a blockage there. I loosened the FMM and removed the rubber line from the hard line to the FFM and immediately saw the problem. The eight inch rubber line makes an approximate 90* turn from the hard line coming up from below to the FFM. It had a kink in it. I replaced the line and inserted a 90* fitting so it will not kink again. Problem is solved, and runs tops.

Thanks all for the help