Update for August 2019.

Got the new 20 gallon fuel tank installed. I ordered a new tank, mounting brackets, and sending unit from RockAuto.
SPECTRA PREMIUM GM1C Fuel Tank
SPECTRA PREMIUM ST01 Fuel Tank Strap
SPECTRA PREMIUM SP05M1H Fuel Pump & Housing Assembly
LILAND GLOBAL IST5068 Fuel Tank Strap Bracket
LILAND GLOBAL IST5067 Fuel Tank Strap Bracket

Got rear brakes repaired. The parking brake cable was seized and the old brakes were worn down to the metal. I got new parking brake cables, new wheel cylinders, new hardware, new shoes, and new drums. Also all ordered from RockAuto.
ACDELCO 18P422 Parking Brake Cable
ACDELCO 18P423 Parking Brake Cable
ACDELCO 18K80 Drum Brake Self Adjuster Repair Kit
ACDELCO 18K79 Drum Brake Self Adjuster Repair Kit
ACDELCO 18E112 Wheel Cylinder x2
RAYBESTOS 2065R Drum x2
ACDELCO 18K560 Drum Brake Hardware Kit
ACDELCO 17449B Brake Shoe
ACDELCO 18J2119 Hydraulic Hose

Old exhaust was rusted out. I removed the clamps to take it apart but it was also rusted together. I ended up cutting it off with the sawzall and welding a new piece in place to join the old and new exhaust.
Muffler
Tailpipe
Exhaust Clamps