Best gear ratio for windy rural roads street car.

In my opinion a well-balanced 340 with a 391 rear end is a thing of beauty a match made in heaven so to speak people get a little touchy about it winding a little but actually 340s piston speeds with a 391 are probably about the same as a 408 stroker with a 355 gear So there's that. 354-355 is a better combo if the car seeing the highway often cruising speeds over 65. I run 391s with a 26-in rear tire four-speed on country roads it's a thing of beauty and still capable of a 130 mph no problem.