First of all, welcome to the forum from North Carolina.
As others have mentioned, you have CVA. A real replica muzzleloader, made sometime in the late 20th century. Looks their ‘Kentucky’ model with a two piece stock. If bore is in good shape, can be a very accurate shooting gun. Typically not a high value gun (but who knows, current market is going crazy), but being your father’s gun, it moves into that ‘priceless’ category for you. Hang it on the wall. Show off your father’s gun. And if you get the urge, shoot it. People here will love to assist you in learning how to make go bang.
Yea I have no intention to sell it. I spoke to my mom about it. She said he ordered it as a kit out the back of a magazine a very long time ago. She said it was the 70s or 80s. She doesn't know if he ever fired it. But she said it also had a matching pistol at one point.
The rifle has been sitting in the back of thier closet in a box for 30 plus years.