...the 65 and 66 tilt columns are basically the same. The only variables I know would be tilts in impala and lower series would have black knobs on tilt, turn signal, and shifter (if equipped) handles, and caprice would use chrome knobs. Remember, the tilt collars are unique to the tilt columns so you want to get collar with the tilt. The plastic shift indicator in the collar would have a different shift pattern depending if from a powerglide or turbo 400 car. Hope this helps.