3.602" is .040" oversize for a 235 engine. It will be virtually impossible to buy a "single cylinder" ring set. 50 years ago, maybe- - - -now, no way! Pull the rest of the pistons and change all of the rings. If the quality of the job the #2 cylinder got is any indication, I would be very spooky about trusting the rest of the "overhaul" job the engine got. Be absolutely sure there is no ridge left at the top of the cylinders- - - -even a slight one will break a new ring in very short order. If there's no ridge, use a button hone to scuff up the cylinders well after wrapping the crankshaft journals with rags and masking tape to avoid contaminating the bearing surfaces. After honing, scrub the cylinders thoroughly with hot soapy water and a stiff bristle brush, then rinse repeatedly with VERY hot or boiling water, or use a pressure washer. Reassemble carefully, making sure you don't break any more rings!
Jerry
