Project`67 Dart GT 340 A500

So quick question:
I have a crack on my windshield on my duster from top to bottom almost at the halfway point, how was the replacement for you?
I have 0 experience with windshields of any sort and there are only 2 shops in my local area that know how to work with these types of windshields. All the other major shops were like "Huh, your windshield is sealed with rubber?"
I do have a special tool for the trim, I have experience taking off and installing the trim, but that's about it.
I have the new windshield and the new rubber gasket, just trying to decide if I want to do it myself or pay the $300 at that old-timer's shop who knows how to work on these.