steveb, they do make a conversion, by R&D, it is a 5 shot 45Colt, SASS legal as it has safe positions between the live chambers (10 locking notches). Check Taylors website or R&D Gunshop's website. Cost about $250.
I have one, it works. You must remove the barrel to load and unload, so it is not as fast or handy as the Remington conversion.
Nice photos, MG66.