If you are truly interested in doing this job correctly, do not use rectangular ERW tube. It sucks compared to round DOM tube.

Using the right materials is at least half the job. Proper design, then execution.

Redcoat Raceworks. Performance parts and custom fabricating for Contours, Mystiques and Cougars. Specializing in chassis and suspension parts. Custom end links, control arms, strut tower bars, engine torque braces, etc.