The IPLfrm Briggs is showing the 495460 carburetor which for the 2 and 3 qt tanks, the 495942 is for the 1 qt tanks. Both are the air vane governor.
You can use the 499952 carburetor to replace 495460 but you need transfer the governed idle spring and bracket to the new carb. You also need to remove the circle bracket in the following image.
Note if the tank is rusty you are better off just forgetting about repairing the engine as the tanks are not available. Also the 495460 is also NLA from Briggs but the 499952 aftermarket one will replace replace it with mods.