JMO... I know that Don has followed Hurst and Hurst products for many, many years. Although non of us are all knowing I believe he has done a lot of research on Hurst and their aftermarket products. Just going to his shop reveals to me he has a variety of rare items and paperwork. I feel we can all learn from these threads and will help identify these products when this subject comes up again on other rare cars like Marks. Sam