So you think he removed the vacuum pod, added side bowls. metering blocks and pumps? I read somewhere they were Ford carbs. Take a look at the old Ford tri power. They are identical. Here's a 406 Ford Tri Power.
You "read" somewhere, well I worked for Mr. Norm for 15 years and believe what he told me. He also didn't use the Tri-Power air cleaner on the first few cars, went to Western Auto and bought the three tiny chrome air cleaners for those also because they were cheap...