Thx for the responses! The engine has been highly modified. It's still in the car (69-Cuda formula - S 340). The car unfortunately was converted to a strip-car (fuel-cell , full roll cage , etc) in the mid 80s by the owner of a local speed-shop.
My brother bought it from him in the late 80s and it's been sitting in my parent's garage ever since. It hardly runs on pump gas , and violates all the local sound ordinances when does! Suffice it to say as it sits, it's a useless pile of crap! That being said it is definitely a looker! We're in the process of figuring out the current value of it , as well as the potential value if it was converted back to a street car.
Thanks again for reading my post and answering my question.
By the way I'm a proud owner of a # matching TA Challenger. I bought it when I was nineteen. $2300! That was long ago (summer of 1982). My brother and I have been E-body fans ever since we saw Vanishing point as kids!