Tom,
There is, or was... I'm not sure if he's still around... a racer in St. Louis who ran Olds-powered Gassers back in the late '50s/early '60s whose name was/is "Wayne Artega." Wayne built a assortment of Gassers with a partner, whose last name was "Helmuth," I believe (can't remember his first name.)
One of these cars was a green Henry J, but they elected to run C/Altered with that car, so, the engine was located 25-percent back, rather than the requisite 10-percent for a Gas Coupe.
I lived in St. Louis for about 6 months in 1961, but I don't think that car had been built yet, as I went to the drags across the river at Alton, IL several times while living there, and never saw it. Now that I think about it, I seem to remember a magazine article (Popular Hot Rod?) that showed the engine in that car with a Potvin, front-mounted blower on it at one time. That would have taken it out of C/Altered. Back then, the addition of a blower moved you up one class... but that changed in about 1965, I think.
In about 1963, I built a Chevy-powered Henry J for C/Gas with a partner (Bobby Roper), and discovered that the way those cars are configured, the 10-percent engine setback that was allowed for Gassers (measured from the centerline of the front spindle to the #1 sparkplug hole) placed the front of the cylinder head directly under the base of the windshield... that's how far back the front wheels are on those cars. Without an engine cover, the distributor was directly across from the driver's belt-line! I could reach over and turn the distributor for more timing from the driver's seat!!! LOL!
The engine in that Artega car was back, yet another 15-inches (Henry J's have a 100-inch wheelbase, so even ~I~ can do the math on that one!!!)
Admittely, it LOOKED, from the outside, exactly like a Gas Coupe, but it ran C/Altered with a 345-inch Olds, I am pretty sure.
Hope this helps.... You might find something about it by Googling "Artega-Helmuth", dunno...
Are you guitar player? I am. Saw your pic at the bottom, and wondered about that Strat... (or, what LOOKS like a Strat.)
Bill, in Conway, Arkansas.