Starting old engine- Carb problem

[sixstring]

So I got my engine that has been sitting for 12 years to crank over. I am having a problem with the carb, its spitting out gas. It seems like its letting the fuel come right through and not "regulating it." The carburator was in a bucket in the truck when I got it, it was pretty gunked up so I let it sit in the parts cleaner for a few hours if that helps any. The idle mix screws were un even as well. Any ideas? Thanks