I'd pull it, you will regret not doing it while the front glass is out, especially if the dash frame needs it.
Ask yourself - what is the one thing you always look at when seated in the car, the dash and the front glass.
Its too easy - especially if the windshield is out. Unless the car has AC there really is not that much to an Abody dash - the wiring harness, and the only other things that need to be yanked or dropped is the steering column, the defrost duct hoses, guage cluster, heater panel, glove box door, the cables to the heater box and the emergency brake. Even if the car has AC its not that much more to it. You dont even need to remove all that stuff just leave it layon the floor of the car. The pad can be taken off after the frame is out.
You can always go back and change out the dash trim and pad with it installed, but the dash frame is another story. The dash is held in with about 5 bolts from the windshield area and two bolts near the kick panel - one on each side - and a couple on the brake pedal support. And as said before the dash doesnt come easy with the glass in.
My .02......good luck deciding.