Valiant Newbie

welcome!!!! pics!???? sounds like a truly GREAT find.
I would pull the tank and drain it, better to sit half full of gas than empty. the fuel pickup and maybe even the line from tank to fuel pump full of varnish!?
if you replace such, any Mopar parts supplier of even Feebay can supply such.
like he said, 2 choices on brakes, rebuild the inadequate orig 9 in drums or change to disc. the best way to go is used setup off 73-6 A body, IMO
yes I run the 9 in drums on most my cars but I live in the STICKS , very little traffic.