Need help with windshield and rear window install on 67 barracuda

From what I can see in your pictures the lock strip will push the gasket out towards the body quite a bit.

My 68 Coupe has that style gasket (Steele sells the same gasket for coupes 67-69) and when I got the car there was no lock strip in the groove and I had quite a gap all the way around. Once the lock strip was installed the gasket was against the body all around with a small gap in the corners.