You guys who run your 67/68's on the circuit, what front spring rate do you run and what size front roll bar?
depending on what you are running for an engine, you can run similar stuff to the 65-66 cars, they use the same spring. i would use a 1" front bar and 620's on a small block and 1 1/8" bar and 720's with a big block. if that feels a bit soft then you can always move up 100lbs on each.