Glad I watched it, always wondered about the paint marking on my rear axle and even though they are bold and bright I put them back. This is the first BB A-body I have seen with basically the same markings. While mine is only the 383 it has a lot in common and yes the 383 cars had torque boxes as well not just 440 thing. Guess what they are saying is this car in the link must be a fake cause it has none.
This car (Black One) has sold in the past for good money and seems to be unfinished in many respects.