Gear ratios and driveability

Overall tire diameter affects the final drive ratio.

If a taller 14" is available you could try that?

For me & all around driving (no track) I prefer a 3.23 with 14" tires & a 3.55 with 15" tires.

3.91s at 70 MPH can be done, but it is not something I want to do myself for very long.