I've had good luck using a tap that fits tightly into the pin (I think I have used a 9mm tap). I screw the tap into the pin until it binds up and the pin rotates in the block. At that point, the tap will be mechanically stuck into the pin and you can pull the pin out by the tap (using vise-grips if needed). Once the pin is out, lightly clamp the pin in a vise and unscrew the tap.

Scott P.