A neat story, but some of the facts aren't quite as I remember them, be that as it may. I was under the impression that the RatRoaster intakes were more drag racing items than NASCAR, along with the Holley Dominator carb. The "devil" will be in the supporting documentation, if ther is any.
Certainly a historical piece of Mopar Racing's past. Only thing is that when the repro blocks and crate engines came out, most of the "value" of something as the item on eBay seemed to decrease. The available market came to be a more niche market than not (i.e., somebody that really needed the sort of engine for "period correct" race vehicle restoration).
Good luck to him on the pricing . . .
CBODY67