The radiator should have a thin L shaped braket on each side.
I have heard that Griffin and BeCool radiators don't come with the brackets. You can get them from your old one (if you have it) and have them rewelded at any radiator shop. The shop can also make some easily; about $50.
Just be sure the radiator is tight against the support to give enough clearance for a clutch fan (or electric)
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