I need information on installation of a '66 Chevelle tilt steering column into a '64 Chevelle. Is this a bolt-in swap? Are the overall lengths the same? Is the diameter of the tube where it goes under the dash and through the firewall the same? What modifications, if any, are necessary? Any information anyone has on this swap is greatly appreciated. Thanks, Leo

65 and 66 are the same as far as I know.
64 is probably the same too??
Should be direct bolt in.