Thanks for the clarification Ryan,

Great info Darryl, the GM documents certainly tell the tale,

Now you've got me thinking about the hole location on my 65. so I compared with your 64,

Looking back through some CP pictures, I found a decent picture of a 65 Parisienne from down under.

And it appears to have the "correct" black nut, so we assume it should be original, and it's not positioned on the ridge. So my 65 (right image) appears to be close to the right spot. Perhaps a little closer to the ridge though? Drilled wrong?

The 64 looks like it was positioned on the ridge for just one year 63-66, judging by it's unique part number in the group. See (2) Bezel, Radio antenna.

I edited the GM docs to put them together for ease of viewing, 

Looks like that black stylized cap bezel 5171018 (6) is used 63-66, at least on the front mount. There are also a few more carry over's between years seen on the list.

Interesting to me, even if it's just a simple antenna...

Thanks Ted.

Mine is maybe 2" further forward, 1/8" further in from the ridge. It's a dealer screw up, but nobody will be the wiser.

What are you asking for it? 

Both of my 65 Beaumonts have this style tapered mast bases.

Hey Lawrence, all this antenna talk reminds me I still have to drop off that antenna nut to you that I don't need.

Ok, so it's clairified now as to what a 65-66 full size Canadian Pontiac front fender mounted antenna looks like.

Now who has one for sale, even a base without the mast...