I am getting ready to purchase new torsion bars for my 73 Charger. It has a 400 with a 727. There is also an Addco front sway bar on it I am rebuilding the suspension and will have poly upper bushings, rubber lower, and poly strut rod bushings. I will also probably install an Addco rear sway bar on it. Would 1.00" or 1.06" best fit me. I want the car to perform and handle well and might take it to autocross a couple times. The 1.00" spring rate is 160 and the 1.06" spring rate is 208.