Steering Box Ratio Options

[ScotI]

Researching a new steering box for an early A/g-body (1978) that's street driven.

Front set-up parts include:
SPC upper a-arms
Speedtech Lowers
Tall BJ's
Hotchkis 1" drop/600# coils
Ridetech single adjustable front shocks
36mm GM WS6/IROC hollow sway bar
18x8 w/245-40-18's

Options I've found for tightening up the ratio are 12.7:1 & 10:1. The 12.7's are listed @ 3-4 turns lock-to-lock & 10:1's @ 2.5 LtL.

Are the 10:1 boxes too much (sensitive) for the street?
Thoughts?