my 30 model A has "V8" wheels and hubcaps. The tires say "BF Goodrich High Miler" and "550x16". I got a matching spare wheel but can't find these tires and suspect they're not made any more. They are wide whitewalls.
You maybe wouldn't notice any appreciable difference in the 6.00x16. And anyway it will just be a spare to get home off a flat. I think the 5.50x16 looks more appropriate on a Model A Ford if you don't plan on having stock wheels and tires.
205/75/16's if you want a stock look...cheap too.. modern radial superior to bias ply tires. Amazon crazy cheap, prime puts them at your house with no shipping cost