Tank has no rust in it at all which is great:
Got a new strainer + ordered every single hose in the fuel system -- so that should eliminate any possible swelling, cracking or inner rubber disintegration if there is any. I'm "hoping" the pumps are ok, its just the lines that have swelling causing a loss in volume and not pressure. It makes sense, but who knows.
Its pointless replacing parts until the lines are done.
A big thanks to Phil for finding 3 special order hoses. (FPR to return line, Feed line to distrib + return line to tank)