Been offline for a few days but wanted to comment:
On track I don't think I ever use more than a 1/4 turn on the wheel maybe 1/2 turn in reeeeally slow hairpins. As for feel, yeah a rack would probably offer some better feedback but on "dreaded treadeds" you're drifting the car pretty heavily to fast........so we concentrated on chassis rigidity. Besides that 70's box is part of the fun.
Fro Rally: well having driven a stock 1200 about 75-80 mph down gravel roads....umm yeah a 90" wheelbase tippy econo box starts to get floaty, so faster steering might help OR just encourage you to have a bigger crash.