Well, the filters on mine are right where the fang vents are. ;)

There's still some heat soak, but there's only so much you can do.

Yeah, there's nothing you can really do about it. You'd have to completely shroud the radiator so that nothing was between it and the outside, and the shrouding would need to be insulated so that it couldn't heat soak itself.

As an engineering exercise, this would all, in theory, stop heat soak of the intake tract, but in practice, it's mostly a waste of time for 99% of cars out there. :)

You don't really have the space between the radiator and timing cover to build in a duct with a hood vent/extractor and a pusher fan on the underside of the hood. The angle would be too sharp. That would be the ideal setup if you could pull it off, though.

Exactly. If I was building the car into an unlimited class time attack car, and had a comparatively enormous budget, a custom radiator support would happen + the firewall would be cut and extended rewards so that the engine could be moved back 4-6 inches.