Reverent said: One of them was THOROGHLY cleaned when I got it and it gurgles. Here's a dumb question- Do I need to Re-break it in?
That's not a dumb question at all. If the person who restored/cleaned the pipe reamed the cake all the way back down to wood; Yes, you need to break it in again. Breaking in a pipe is just building up cake in the bowl to protect the wood.
Also, even if they did not ream all of the cake back to the wood, sometimes if there is only minimal cake in the bowl, the pipe will sometimes gurgle. But you have to remember that other things will make a pipe gurgle. Check the construction on the pipe as well.
Don't let a gurgle get you down though, just swab it with a cleaner and keep smoking!