Nice! That rendering of the GNX made the cover of the Kirban Guide and the entire poster is shown on page 261 of the book too. Great addition to anyone's Turbo Buick collection, and one that I would love to have myself!
Quote from page 261:
"...The only other authorized GNX poster was done by ASC who actually produced the GNXs for Buick. Back in 1987, this poster was free from ASC. You just had to call them and request it, and they would send you one absolutely free. This poster is no longer available...
...The gorgeous full color original artwork for the car on this poster was done by James Ibusuki, an automotive portraiture artist in California. A limited edition print of this artwork is available from him at P.O Box 923184, Sylmar, CA 91392.
We are fortunate to have the use of this artwork for our book cover!"