Heres what I see. The front window gasket is not correct for 67 model. That is a one piece self locking gasket ( hasn't been locked in your picture ).
You would use that gasket on 68 or 69 with stainless reveal moldings.
Those moldings can come from any A-body except Duster and Dart Sport and many people do use these gaskets and trim on 67 models. I dont think that was you plan because I dont see the clips that hold those moldings on in your picture.
Now about the rear gasket. That is a 2 piece gasket. The correct locking insert is plastic and look like chrome. It is a little larger than the round black cord so it will spread the gasket out some. The gasket never will completely fill those voids in the lower corners,
To install you should start by placing the gasket on the car and make it look and fit as good as it will in those lower corners while installing the glass working from bottom toward top.
The stainless moldings could be used at rear window also but again you would need to install those clips that hold the moldings on.
The stainless moldings for the rear must come from 68 or 69 Barracuda notchback only. I hope this helps :)
