I'm using them on both my 68 Charger and 69 Daytona clone. In addition I also have a stiffening plate on the LCA, 1-3/8" Hellwig front swaybar, upgraded TB's, US Car Tool core stiffener and subframe connectors. Both cars corner very flat, very happy with the results. Rear sway bars are next on the hit list.
If you do buy these make sure you ask the rep for what numbers to use for the front end alignment. When I took my 68 in for the initial alignment the tech argued with me saying I would scrub all the tread off the tires in the first 10k miles.I told him that would be my problem not his. He even wrote on the documentation the front end was not aligned to factory specs. I now have 8k miles on the 68. The front tires still look brand new. Rear tires are almost ready to be replaced-LOL