CPP I know they work on a 66. The 65/66 drivers side chassis mount is better than previous years clearance wise I think. I have a 64 and changed to a 65/66 to clear the differential cover. Something to think of (or plan), Once you buy one company's suspension products another company's various other parts "may" not work together. So plan for the future.
https://www.performanceonline.com/19...-Bar-Trac-Bar/