Early A windshield replacement. How hard???

OK, I'll come right out and ask.,.,.,

I'm about to install the front and rear windows in my '64 Barracuda and have never done this before.

I don't believe that I'll be able to reuse the old gaskets so I'll be buying new.

Do I need to use any type of sealer at all, or will the gasket be enough? Not trying to hijack this thread, just trying to learn.


Thanks,
Dave