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I made my hood scoop functional using a velocity stack, cut down air filter, backing plate and weatherstriping to seal filter from engine bay heat, and a hole in my hood...
I dont know how much of the cold air effect that spectre kit would actually acheive. If you noticed, the composite intakes made by brands such as K&N etc are composite on purpose. These new plastics dont absorb heat as easily as metal does. It looks to me that the metal carb cover thingy and the metal tubes would slowly heat up as the engine heat up.
Very similar to what was run on the '64 Fairlane Thunderbolt 427 engines.
That is what it reminded me of too.
Cold air is plus when you can get it. Just keep in mind that sacrificing cold air for air flow obstruction does not get you anywhere. Don't choke your air flow in pursuit of cold air. Make sure the ducting is plenty big enough, has few bends, and the ducting is smooth.
Honestly, I think it's a waste of money. Any gains will be minimal, if any, and probably no more than you'd get from running a bigger open-element air cleaner.