Steering Wheel Question

The bigger wheel will only yield less effort, that's the leverage part. Ma Mopar supposedly required power steering with the Tuff wheel because it was only 13½ inches in diameter.
Lock-to-lock turns is determined by the steering box and linkage. Mopar power steering was 3.5 LtL while the manual was typically 5.2 LtL. The AAR/TA twins had a different manual box with a quicker ratio.
A stock manual box can be given a speed treatment by replacing the ball rack with one from Mopar performance. The other ways are to shorten the arm on the ball joint or lengthen the pittman and idler arms. (Better be able to measure & cut precisely, and weld well.)