Sorry for the late reply. I now keep my car at my daughters house and haven't had the time to get there for a few days. Attached are pictures of the j-hook from the 67 04B LOS coupe (left- short & straight) and 67 05B NOR convertible (right- long and curved) for comparison. I re-plated the convertible hook during restoration and you can see the difference between what looks like original (and aged) cadmium plated on the coupe against a bright zinc plated finish.
The hook size for the convertible is 8" from tip to base edge as seen in the photo.
Mike