Update.

The fuel has separated and the tank is coated in a rich layer of tar. Tank removed and with repairer - will get back today. New lift pump and cleaned fuel gauge sender ... it looked like it was from the jurassic.

I'm hoping the high pressure pump and fuel accumulator are OK but we'll see. The injectors and fuel distributor were sealed in a plastic back with lots of WD40 so they're good. I've flushed the injector lines with WD40 and compressed air so I think they're good.
I plan on putting back the tank, disconnecting before the fuel filter and running the pump to flush out the line. Wish me luck.

Tom.