RE: 5.9L vs 5.2L
Thats a new one on me. "Torsional Damper" I am old school and back then we called it the harmonic balancer. This would be the large round pully that is attached to the front the crankshaft and drives the serpentine belt.
I do understand the difference in the two engines as far as balancing, but will to defer to Hank asI have not spent enough time around the 5.2/5.9 to verify this aspect.
Sounds to me like the salesperson did not know his apples from oranges. I met one like that once. My cousin and were looking at a mid eighties Ford pickup on a lot, and noted that the air cleaner said "351 4v" We kind of thought that common sense would say it meant 4bbl carb, but did not want to take the lid off so we asked a nearby sales guy. His reply and I quote was, " oh, that means it has 4 valves" [sm=chattypair.gif][sm=chattypair.gif].
Anyway, the vin says a 360, and although I am sure you would go back and complain if things were the other way, I think I would just smile and go on.