Since you mentioned that the firewall and cowl are damaged, you would be wise to have an experienced, long time collision tech look at the car. From my time running a body shop, a hit like that affects way more than just what you can easily see. You need to look at the floors, rails, windshield frame all around, the door hinge pillars, rockers, roof etc as one or more of those most likely moved too. You could just drill out spot welds and swap the firewall/cowl when you do the front clip but you need to see how the doors fit when installed, windshield in, fenders on,core support, hood, grille, bumper etc. You can get a good reading from the targets on a frame rack but that doesn't tell you anything about the rest of the structure and bolt on part fit. We had several where the frame showed good but the bolt on stuff didn't fit unless the techs did upper structure pulls and check fit of the bolt ons or glass. Before you end up with the Titanic version of a Charger, seeing you funds sink into an abyss, get some experienced eyes on that car. Our early cars were state of the art back then with the unibody construction but are nothing compared to the rigidity of the new ones. And we didn't work on old stuff, just late model. If we saw those kind of issues on newer, can you imagine what primitive tech looks like? I don't want to quash your dreams of landing a Charger, but I would find something better especially if you don't have skills or resources.