I’m trying to wake up my ’73 S with MFI after 15+ years of sleep. I bought it knowing the engine does not start due to lack of fuel (hopefully only fuel issues

The gas tank has a brown gooey layer and likely the rest of the fuel system does to. The fuel pump does not make a sound and is likely stuck. I will try to rebuild it based on this earlier posting:
MFI Open Heart Surgery II - The Fuel Pump
My questions are:
1. Is there a solvent that I can pump though the system that would clean all the old fuel residue out of lines, filter assembly and MFI?
2.Any recommendation on real good quality fuel rubber lines.