Yes, a Muncie can be installed in your Charger.

Many years ago, when 69 Chargers were much cheaper, there was a 4 speed Charger advertised in the local newspaper. I went and looked at it. It had a Muncie transmission in it. The car's owner lied about several things, and I was real suspicious he was covering up other stuff. I did not buy the car primarily due to the fact that I didn't trust the seller.

Unfortunately, I can't recall the details on exactly HOW he installed the Muncie, but yes it can be done!