RedGreen,
I have the stock set-up in my '49. 216 cu.in. with stock water pump and fan. As I said, I have not yet installed the KKS radiator, but I will be taking on that task real soon. I will let you know if I run into the same problem, or if mine slips right into place. When I measured my original radiator against the KKS unit it all measured out the same...or seemed to. I will let you know what difficulties I run into.
Tim