65 Dart with a 273- air cleaner base removal ?

It seems the base does not want to lift off ,I noticed there is some sort of lever on it , can somebody help I am trying to remove it so i can paint it.

View attachment 1714993089

View attachment 1714993090

Just want to say that this is an example of why A body folks are the best- always willing to take the time to help

Don't ever hesitate to ask a question with what ever you are struggling with- people happy to help