I bought a made to order Brassworks heater core. It was expensive and took 12-14 weeks IIRC, I have yet to install it because it's a PITA job but the part looks well made and to be of quality. I bought the newer update, apparently their 1st model lacked heating output, this one is said to be revised and OEM output. Check them out during your search, they are a speciality radiator and heater core manufacturer for old vehicles. USA made.