I have one that would require the little "U" shaped brackets and rubber cushions at the top and bottom to hold it in place. It has no side brackets with mounting holes like a normal Beaumont rad would have. I pulled it from a 66'ish GTO years ago in a Colorado wrecking yard, and ran it in my Acadian for likely 10 years when I had a 427 in it. It's been sitting in my basement since I pulled the 427 out. I've never had it recored but never had any issues with it, so never bothered.
Oh, wait, I need to check. It may not have a trans cooler, I think it's for manual trans. If so, you would have to put on an external trans cooler, I think that's what I had with the 427.
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)