The car was for sale on San Francisco Craigslist on February 24th, 2009. At that time the ad claimed it was a real Z/28 with non-original MO 302 currently in car. I contacted the seller and he emailed the numbers back to me. The pad is stamped 18L334378, VO308MO, so it's not numbers matching. At least it wasn't back then, but it sure was close!
Ed