Nice looking mount box car! I've been doodling with one of these engines for several months and have not been completely satisfied with the mounting options. Yours is clean and fairly simple....let us know how it holds up under running/vibration. I've modified the head for glow and tried to get it to run well with the original carburetor, but I'm about to give up on the carb and install another conventional Walbro with dual needles....tired of removing the fixed jet to re-drill it each time I need to tweak.
Have you run yours yet, and do you have any tach readings?

Gary