1969 AMX rear quarter window -Q. sealing it up tight?

[Stink]

I just bought a 69 AMX and working through a punch list of things to get to. One thing I want to do is to insure the body is better sealed from moisture. I couldn't help but notice the big gaps in the trailing corner of the rear quarter windows (see pics).

Recommendations? Is there a gasket I should be looking for?

281280
Thanks,
Stink

[Glitzerosph]

I'm not quite sure. Can you take a photo of it in a different angle?

[AutoStart]

These pics are at a wierd angle. I can't quite make out the second pic but the first pic looks like a stock set-up. My 1969 is the same with a large gap and the top sill hanging out over the bottom. Looks clotsy but I'm pretty sure that's stock.