subframe connectors questions

well since this is going to be a road race car / street car and not an all out drag car i am not so much cioncerned with the twisting forces of the front end lifting under accelleration on a drag strip. i am more concerned with the side to side chassis twising forces from a heavy duty suspension and a road race type of course scenario.

i know that if i mount the tubing 3" high and 2" wide it will result in a stiffer chassis for drag racing, but if i mount the tubing 2" high and 3" wide will it result in a stiffer chassis torsionally (twisting for road race)

mounting the tubing 3" wide helps installation to the rear framerails, with brake line clearance, rear foot pan clearance only 1/2" intrusion into the foot well, and parking brake cable clearance. but will .083" wall thickness be enough? if not should i purchase some .125" 2"x3" and mount it sideways?

id like to use what i have .083" 2"x3" since it was free, and is the same thickness as the stock framerails.

any ideas or am i overthinking this whole thing here? its a ***** to do this and i only want to do this once. i imagine its really a ***** if i got to cut it all back out and go thicker later.
matt