I found a 974 yesterday at a local yard .It was in a '70 b-body 318 a/c. The tank is in perfect shape and the core is a 2-row. That's why my previous post. I didn't know if an original was 2 or 3 row core. This one has been recored and I took it to my local radiator shop and it tested fine. He is going to vat it and clean it up. The best part is I paid $40. It has large font numbers so it will be correct. My lucky day.