That's it. 300 series used on 61-63 LeSabre's & Invicta's. I think that the Wildcat & Electra used a bigger block. Some had 2X4bbl carbs, especially on the Riviera. And silver was the color!
64 engines looked more like Pontiac V-8's of the day. Later engines were painted red.
Man, are we dating ourselves, or what???