Replacing faucet - old faucet doesn't have threaded shank under sink

[FLGuy]

Hello guys, long time reader - first time poster. Being a new homeowner, I have a feeling I'll be here a lot

So my wife wants to replace our current kitchen faucet with a new faucet. Not sure of the brand of the old faucet, but the new faucet is an American Standard. I understand the concept of replacing the faucet, but where I am confused at is the bottom of the current faucet. I was expecting to see a threaded shaft to unscrew the old faucet and pull it out, but its not threaded. It's a metal "cup" that is soldered to the bottom of the sink it seems. I attached a photo, hope it helps. How in the heck do I remove the old faucet? I also attached a photo of the new faucet.

Thanks in advance!

 

[frodo]

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[FLGuy]

Thank you for the response. I understand that, but that opening would never accommodate the current width of the new shaft. Guess that is where I am confused.

 

[frodo]

common size hole for a faucet is 1 1/4'' hole in the cabinet top

 

[frodo]

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take it out and look at it, if hole needs to be bigger, drill it