I don't need perfect, just some assistance in stopping the major roll.
The wife & I put about 120 miles on the 66 last weekend. I paid attention to the sway or roll while cornering and there wasn’t any . I think you’ll be pleased with the results if you install a rear sway bar. I think mine are 1 1/8 front & rear. I’ve also got BBC coils in the front & new std’s in the rear.