So what is the truth? Should this spacer be on my car?
First welcome to the site.
For fast answers on things like this the do it yourself method would be to simply check out the Unrestored Picture Threads (further down the main page) would provide you with a fair number of pictures of unrestored car similar or like your car.
- Some examples from that section
In the upper right of the picture
Couple to that show the spacer on a 2V
- Another source would be getting a copy of the factory assembly manuals. You'll see a fair number of members suggesting to get all of them for your 66.
-Last option that could be consulted - check the picture/illustration section of the MPC. You will find a link to those in the Library section of the site