rear window

Need some help----ordered new front and rear window reveal molding clips for my 67 Chevelle 2 Dr. Sedan Post. The front clips are lower than the body panel and seem to be correct and will accept my moldings. The rear however appear to be too long and the molding does not sit flush back against...

I am to the point of installing the front and rear glass in my 69 restoration. I was considering installing it myself, but after reading about butyl vs urethane, and setting the glass the correct height, I have decided to get a professional to install the glass. But I want someone that knows...