4d9r,
Here's another idea for you. I have a '58 (same heater). I had the original core with mine but, it was so corroded that it couldn't be fixed. So, what I did was spend an afternoon looking at the catalogs at my local O'Reilly's till I found one that was close. I think it was actually for some small import car but, it was the right dimensions (actually, if I remember right it was a bit taller) but, there's some room to play with in the heater box. Anyway, all I had to do was change the inlet pipe a little bit and it fit like a glove. (If you've ever sweated copper water lines it's the same thing). Here's the best part I think the price was something like $35.00!!! A lot cheaper than a reproduction or a recore and it even had a warranty!!
