Yeah deleting everything, going ham with it haha. Thanks for all the advice, will most likely go with a rubber seal and the foam spray, already had to do a bit of welding on the firewall for rust. But I figure at least if I go with the spray and rubber seal it will be easier to change my mind later on. Pretty much the only thing I would want from it would be the defroster, but I rather try with the whole thing out first and see how it goes. I figure can always drive with my head out the window if it gets to foggy or wipe em as I go. It's not a daily truck just a mountain/trail truck. But thanks all for the replies. Hope to be able to throw some pics of it up when it's closer to finished.