Intrigued by the Jalopy Journal article, did a little poking around and here it is: http://www.scorchedpistonproductions.com/ the 22nd of July at the Placer County/Roseville (Norcal) fairgrounds Apparently, the organizer has gotten kicked out of several venues in the past (perhaps due to the unauthorized car jumping?); at least that's what a newspaper article previewing last year's event implied.
Check the " Carnival car show/stunt show this weekend " thread. Scotty will answer any Q's you may have.