1973 340 Duster Resto

Ok When I dropped the tank the top half was very crusty and the bottom had a nice layer of sludge. And found the bottom of the tank is all beat up. Need to order a new one.
Also rebuilt my carb and no leaks except between carb and intake need new gasket.
Also it is still back firing and all plug wires are goin to the right place.
And gotta get a new master the one sittin on the shelf is bad. Once new onecomes in we will rebuild the brake system with all of the chargers parts nd get all new for the Charger
And have to pull rearend apart to rebuild it cause both axel seals blew out and also through in a sure grip and maybe 3.55s