Thanks Dean. I'm thinking that the one with the surround brackets is good and that I just need my radiator guy to take both radiators and use what ever he needs to make one work with what I have. I do have the bottom part that bolts to the front cross member. In fact, I have three of them. The best one I blasted and painted already and its the one you see in the picture. The other two seem to still have remnants of the bottom part of the core soldered to them. I'm hoping to take the whole business over to the radiator guru tomorrow and have him do whatever he needs to do to make it right -- including the shell so he can see how it all ultimately needs to work together.
Both rads seem to have serviceable honeycomb cores.
The rad with the side brackets attached ... What does *that* go to?