So through history the devil has taken various forms of travel, from horse, to boat, cars, and even trains, the reason Josh Turner used 610 for the music video is cause he's a local, I currently don't live to far from the Tennessee Valley railroad museum, the video is primarily saying if you sin, you'll ride that long black train straight to hell, it just so happens that 610 was used for the video. It's honestly not that deep. Good theory though and you seem like you know your history, keep reading up on it though you'll learn a lot of you do your own research.
Thanks and also when the video was made 610 was the only operating steam locomotive at the time and now you bring it up I think the Long Black Ghost Train may be a based of the New Jersey Ghost Train but It's just theory.
