[289ACE]

Ron,
Thanks for the info on the manufacturers, I'll see if there are any IDs on them. I am familiar with the Ace radiators and these are not from an Ace. One of them looks very similar to (if not the same) to a '61 Corvette radiator, but I thought there was a subtle difference between the Corvette and Cobra versions so I was hoping there is a sure fire way to tell a Cobra one. As you said, hopefully someone will chime in with the secret decoder ring.
Jay