I gather the clamp on the left, sold by the parts vendors, is Ford correct, though I haven't found any documentation for that yet. How about the wire clamps? Are they period correct, or later? Who used them?
The wire type clamp is a replacement clamp. The one on the left is what is currently available, and is not like what was available until recently. I just got an email from the company that made the correct ones, and sadly, they informed me they no longer make them.
Larry -- Do you have a picture of what the correct ones look like?
My first experience with the one on the right was in the 70's with foreign cars. The left has been around longer as me (LOL)