Mark,
If you can possibly snap a photo of that poster, it would be a big help in ID'ing the roadster. We have lots of old pictures from the "12 Port News" and maybe we can find a match.
Our 12 Port Historian, Pat Swanson, is a font of knowledge on the early 12 Port-powered cars. If anyone in the club can get more info for you, it would be Pat. His archives go back to the very first engines built by Wayne Horning. And of course, Mr. Horning himself is alive and well in Incline Village, NV.
We consider the 12 Port engines and their racing history to be the very core of our club's beginnings, and are hoping to produce and eventually publish a complete history of all of the various 12 port varieties, from Horning, Warner, Howard, Toros, Stevens, Fisher, Baker and most recently, Nick Zaillian and Nick Arias. This history will include all known race cars, and a "survivor" list of heads that still exist. The El Mirage car you mention might help fill in some gaps!
By the way, if you haven't checked out the "Historical" link on the left, we have reprinted some articles from the early years of Inliners International and also posted some photos from Harry Warner's "Memory Book".
