krewzlo
+1y
I have used that double din kit on my dually too. You can get by without and still keep the heater controls and pocket where they are stock and stuff the double in on top. Thats the way I originally did mine but decided to give the kit a try as I really didn't need the pocket there. The hardest part is trying to fit all of the wires behind the head unit. I don't have any pics and I still need to finish the filler work but I am close. Not sure that you want to use fiberglass though when working with plastic. I have never had good luck with it sticking after awhile. I used plastic filler on mine. It sands much harder but should give better results in the long run.