jdzcnO,
Likely not the situation you're dealing with, but if it's not the hoses or hose clamps, you might have the same thing that gave me fits for months; My original 57 radiator had a bunch of pinholes in the brass just below the upper hose pipe. Probably from age, corrosion, flex, etc. I could not find the pinholes but kept seeing the fluid all over the upper fins after a run, particularly when I overfilled the radiator. Tighten as I might, I still kept seeing the leaks.
When I wire-brushed the paint and corrosion off, I could clearly see the antifreeze weeping out of the pinholes.
Like I said, may not be you issue, but I chased that tail for too long not to throw it out there. I ended up using Muggyweld to seal the pinholes until I can afford a recore.
Best,
Jim
