only the 2nd 307 1969 Camaro I've ever come across, looks like it was heading for the Optima Ultimate Street Car Invitational, but I didn't see it there

This is Mark Stielow's, and you might remember his name, he's been in the car magazines for a couple dozen years, and 2wice won the Optima Challenge in 2010 and 2012

As found in Oregon

http://www.superchevy.com/how-to/project-cars/1701-mark-stielow-takes-a-different-approach-to-his-latest-1969-camaro/

Mark happens to be a GM engineer, normally in charge of Z/28 development and other Camaro projects. His former roommate? Went on to found and operate Detroit Speed