Your inclusion of Stan's 2-engine car is astounding to me. I believe that I am the guy who built the rear, 286, engine. It had an Isky 404 cam with radial tappets (same cam as Yates-Mickelson) and was balanced by Granatelli in Chicago. The heads-as I sold it to Stan in 56- were Evans. Are you familiar enough with the car to verify thats the engine? I haven't spoken to Stan for 50 years and would be thrilled if that was a pic of an engine I built in Spfld.
Jim Delaney