Recently bought a '72 2002 that ran hot, temp gauge near red, so I replaced thermostat with no improvement. Went ahead and removed radiator and took it to local radiator shop. The guy took one look inside and said it was 90 % blocked and needed to be rodded out. I said okay and left it with him, but he called me later that day and said I had some corrosion along the bottom and it should be re-cored. He went on to explain that the radiator had 3 rows of 1/4 inch tube but he couldn't get 1/4 i