Interesting ... My '67 convertible does not have the shakers in the front or the rear, and it doesn't have the x-brace or subframe connectors either. I do have a vibration on the highway, but I was thinking it might be due to an unbalanced driveshaft because it seems sorta "harmonic." Now I wonder ... any comments? And does anybody know a place in the San Diego area that could check out my driveshaft and balance it if necessary?
