In order for there to be enough gasoline flowing down the sides of the cylinder walls to sieze the pistons - there would have to be gasoline in your crankcase - if you pull the oil dipstick, and it does not smell strong of gasoline - then the "siezing up" is eliminated.

I live where it gets to -30F and have flooded engines many times - never has it resulted in the engine siezing up.

But - that is not to say that you are not barking in the vicinity of the right tree.

How many miles on the engine?

What year - carburetor or fuel injection/computer?

Has the maintenance - oil changes, been on a regular basis?

Have you done a compression test - a dry piston test, then a wet piston test?
- a wet piston test is done by squirting a few squirts of oil into the cylinder to seal up the rings - if there is a great difference in the compression between the two methods - then the rings are suspect.

What about the ground connection to the battery/block - even a great battery will not perform at tops if there is a faulty ground.

Good luck