Join Date: Nov 1998
If the car sat for a long time it could be that there is some rust on the drums/rotors.
Just run it around the block with your foot lightly on the brakes and see if it goes away. This is a very common thing. If that doesn't fix it then you might pull the wheels and look at the drums/rotors and try cleaning them with brake cleaning fluid. during the resto process some junk might have gotten on the drums/rotors. If its bad you might have to replace the pads.
Another thing I just thought of is, did you just turn the rotors/drums down?? If so they might just need to seat in.