the 1933 Chevrolet master series tank would be for that year only , due to the specific location of the gas tank filler.
If you have a stock tank, you could take it to a gas tank repair place and have them boil it out. If its heavy rusted inside, put sharp edged glass or stones in the tank and rotate it like you would on a rotisserie to break the rust loose.
BILL HIRSCH in new England area of USA sells a GAS TANK SEALER. You put the product in, slosh it all around on inside of the tank to cover everything, then pour out the excess .
It will apply a protective coating that will last a long time.
mike lynch