Windshields

I'm not sure if my car ('72 Swinger 2-door hardtop) is supposed to have a locking strip or not. It was completely disassembled when I got it...

With the rope install method I suppose the gasket-to-body butyl has to be squirted in after the glass/gasket is fully seated? I've had too many windshield leaks in different cars to go without sealant...

If the gasket is installed on the body first, should I squirt the butyl into the seal at the time of glass installation, or afterwards (lift up the lip of the seal and use a needle tip, as someone posted above)?