I was looking at the carb a little closer and it has MOTORCRAFT stamped on the choke housing but I have had no luck trying to chase down the R6666-1 Holley number in the books that we have at work. I have the adapter plate pretty well finished up, just need a couple of fittings to plumb it and hopefully will have it running by the weekend.

Ontario Inliners
1965 Chevelle
1940 Chev
1965 Chev Pick-up
1970 MGB Roadster