Is that a numbers car? That's badassary at its finest. I've always said that if I had a car like that, I would drive the wheels off it. Too many of them spend their lives in climate controlled storage. Cars were made to be driven.
Not the original engine or tranny but it came out of the factory with a 440/automatic. It has a 76 440 in it, it also came with a 69 440 HP block but it runs fine the way it is.