Tires for '70 Dart

Hello, I have a '70 Dart with the 225 six.

I am debating about whether to get 215/70/14 tires or the more-correct appearing 195/75/14 tires.

I have 14 x 6 American Racing wheels.

People tell me that my current tires (215/70/14) are a bit "wide" for that 6 inch rim, and thus a lot of sidewall flex when I turn...yes, this car as is does not like taking fast turns. They also tell me that a 195/75/14, although a bit narrower, will have a "straighter" sidewall, and should handle better.

What do you guys think? what should I get? I don't want any other rims other than what I have, so I won't be changing rims.

Thanks