Carb Problem

I have a Autolite 4B Carb. The butterflies are frozen. I soaked the carburater all night in chemical cleaner. The exterior now looks like new but all four butterflies are still frozen. What is the best way to unfreeze without tearing anything up???? I am close to using a hammer, please help!!

Thy a propane plumber's torch and heat up the pivot points to free them up. Do not use acetyline because that will turn the carb into a molten puddle.