Mark
The only thing I haven't tried or checked is the fuel flow from tank to pumps.
The old fuel has been a big concern from the start but it's a job I really wanted to avoid if possible. However it is probably going on at least a year and a half since fueling and you are probably right on the money.
Today I took off the pressure side of the gas line hopefully to relieve any resistance for the pumps but still didn't get any gas. It is getting narrowed down to no flow from tank or faulty fuel pump(s)
Before draining the tank I think I will test those pumps individually to make sure that both are working. If I use a battery charger (10 amp) and put the leads on the pump posts would that be too much amperage for those pumps or would I damage something. Also could a check valve in the fuel pump be stuck shut with gum or crap?

Hope this is not too many questions! Thanks for responding!! Dale