Recommendations for new radiator for 1972 c30 402 big block

[Dirt's72]

I'm needing to correct a hot running engine so want to install a new radiator in my 1972 c30 RV ac automatic. Would like it to fit like original one does. Recommendations from anybody? Originally it had a 3 core with 4 core mounts. Took original one to radiator shop for cleaning but they couldn't fix the leak at the welds. I found an original 4-core I thought was clean and still after 2-t-stats, hei conversion hoses it is still getting hot with gauge reading just over half way w/out ac hooked up. I'd like to start with a fresh new one.