I wonder about that track setup with what looks like UHMW material in place of tires? And 50K, really?
Do the sliders remove the suspension? If so, I’d really worry about the cheesy 1404 grouser material carrying 6000 lbs on a 1450, especially with such a heavy front end.
I might be a little gun shy after buying a great running yard ornament for $14k and then dealing with crap tracks.
And, just when was it rebuilt? A 'complete' rebuild and you don't take the time to even paint the valve cover?