to do it right is a big job. first disassemble engine and take block to machine shop to have cylinders checked for roundness and condition. If you are lucky - you could have just bad rings from not doing it right the first time. If the cylinders are round and the tolerences are within spec you could get away with breaking the glaze and installing new rings. Contact Phil at FastLane for prices on parts required. The end cost all hinges on the condition of your block and whether you need reboring and new oversized pistons or not.