Best gear ratio for windy rural roads street car.

cpearce said
Since you indicate not much freeway travel over 50mph, I would lean toward the 3.91 gears.
Here is the formula for RPM

(MPH x gear ratio x 336) ÷ tire diameter in inches.

In this example with 3.91 gears at 50 mph with a 245 60R15 the result is

50 x 3.91 x 336 ÷ 26.6 = 2469 RPM.

Play around with the formula and variables to arrive at an RPM suitable to your driving style. In my experience 340's come alive with a little bit of gear.

thank you. I’ve been playing around with some calculators online which is kind of what got me leaning to 3.73 and 3.91. Mostly looking for the best feeling 0-60 or maybe 0-80 times. Right now I’ve been downshifting a lot with the 3.23 and the 3.73 or 3.91 will do a better job keep Keeping me in the powerband. Right now I’ve been shifting around 5200 but after cam and springs will be more comfortable bringing that up some.