Haven’t really started fixing this car as yet.
Ordered a new fuel filter (Z518),
Found the system from the other white car – tank, pump, filter and lines;
Plan now is to clean out / check these lines and tank and install into RSR550, with the new filter and soft lines.
Am not sure about the fuel pump yet, the above pump isn’t the stock one, I’m not sure of the LPH needed for a replacement. The one currently in RSR550 has allegedly been changed but I don’t know what too — and the tank needs to be dropped to check, and has 27L of fuel in it.