[blykins]

The only carbs that will work on a dual carb intake would be the 1850 style Holley or the 1850 style Quick Fuel. The linkage should work the same, but they will be vacuum secondary carbs (not a double accelerator pump carb) with choke horns.

I think you may be able to use a regular 4150 style mechanical secondary carb, but you would have to turn it 90° and that would require new linkages, possible fuel line re-routing, etc.

In all honesty, I think you'd get more performance and ease of maintenance from just a nice single plane single carb intake and a big double pumper sitting on top of it.

BTW, you can have the choke horns milled on the 1850 style carbs.

I never run chokes on my engines, even here in KY where we get very cold weather. I would rather just sit in the car and feather the gas for a bit until the engine gets enough heat in it to idle on its own.