I found this:
The 1970 Hamtramck Registry - 1966 Accessories Catalog Slideshow (Page 1)
and:
The 1970 Hamtramck Registry - 1966 Accessories Catalog Slideshow (Page 1)
I'm thinking I'll just pick up one of the two post versions and tape it to the passenger side and see how I like it. If it helps at least back into the garage, it'll be worth it. If I can't even use it for that, I'll weld the current holes up and only mount on one the driver's side.
What style do you have on your '66? Is it remote, or manual?