What is this on my valve cover

They usually swing out over to the fender and are secured there as well. This is an early pic as the MC is a single pot.
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Did the finned valve cover models get the extended heater hose brackets on the fender? I remember my 65 'S' had them out there.
Not according the factory photos I've seen that were taken back in 1966. No bracket was used on the non-A/C 273 engines that I've been able to determine.