Engine is running! Time for brakes.

Thanks to all the help on here, my 65 barracuda engine is purring like a kitten. I ordered all new brake parts and started with the front passenger side. all is good but i have a very "newbie" question. I'm replacing the drums. The front drums have the lugs and some other stuff (sorry, don't know the official name) built into them and they don't seem to want to separate to go into the new drum. Do I just hammer away or am i missing something??