Best gear ratio for windy rural roads street car.

3.91, air gap, 750-800 carburetor, and this Howards cam with a set of the following replacement performance springs shimmed for 122 to 125 seat. (Thanks to another here for finding these in another thread)
Howards, Hydraulic Flat Tappet Camshaft, Chrysler SB 273-360, 221/221 @ .050, .470/.470, 108 LS-Competition Products
COM942-16 Valve Springs 21870