My stock 13″ wheels are a 4.5″ wide wheel. IMO that’s too narrow for a 195 on up treadwidth. You’ll get a lot of “roll” of the tire and corner on the sidewall if you push it.
Due to lack of availability of good modern tires in the 13″ or 14″ wheel sizes I went to a 15×6 4 lug wheel from Wheel Vintiques and a 205/65/15 tire. Not too big so still has a vintage look but beefy enough to look right, and lots of tires available at reasonable cost. Don’t know status of getting a white wall in that size range and then you can’t use the stock hub caps either.