I purchased a 2007 dodge charger se head gasket blew, pretty sure coolant got into the engine. Can I put a 6.1 In my charger. Or do I need a kit?

 

1. There is no kit.
2. To actually do it correctly, you would need an ENTIRE donor car to get ALL of the harnesses and modules you'd need, not to mention transmission, etc since you'd be going from that little V6 and 4sp auto to the hemi and 5sp auto.
Fix it or drop a replacement engine in it, unload it and get what you actually want. If you try to do this it isn't just the engine being changed and it will get exponentially expensive quickly, especially if you aren't the one performing the labor. If you joined an internet forum to ask if there's a kit for this then you yourself aren't prepared to do this.