No other access and dropping the tank is a no go? Disconnect the fuel rail upfront, jump the relay and collect in a bucket. Run some fresh gas through it when done and replace the fuel filter.
Do you mean running the fuel pump and draining the tank via the fuel rail? If that is possible it would be easier to disconnect the fuel line at the fuel filter and drain at that point and not worry too much with the remaining old fuel between the filter and injectors at this point. I couldn't do that as I had a bad, non-working fuel pump and a half of a gas tank of fuel. Everything I've found so far says there is the drain tube with the cap at the back of the Lebaron gas tank. I used my Mity-vac vacuum tank, made a connection to that "port" and drain 95% of the fuel in the tank in a short time.
