I started to flush out the radiator on my 86 brat so i drained the antifreeze that was in there then put some cleaner and then drained that then i put the water in there well now the water will not drain i am just gettin a trickle.

Any ideas?

is it still in the car? You might want to get a flush kit which would allow you to run the car and then flush the coolant system through one of the heater hoses. If its not in the car, your best bet might be a radiator shop.

Part of the plug was broken off way inside the radiator