My uncle recently passed away unexpectedly and the only search results I could find for the special Days of Thunder 1990 Lumina model he had was a post on this forum 20 years ago asking if they actually existed. It's my understanding that the Z34 package didn't come out until 1991, so this was basically the Z34 a year early.
He was the original owner, but parked it in the driveway over a decade ago and it hasn't moved since, so it is rust free but very sun damaged, especially interior, and the tires are rotted.
While I am curious about the value and rarity, I'm more concerned about getting it to someone that would actually appreciate it rather than a junkyard.
I posted some pictures over on Reddit and found a Lumina group on Facebook.
https://www.reddit.com/r/classiccars/s/rsBQlkuYGb