The cooling system in my MR2 is notorious for trapping air bubbles, and there is a special way to bleed it using bleed screws. Some guys are brought to tears when they have to drop the fuel tank in the middle of the car to get to the stainless steel pipes that transfer coolant from the engine behind the cabin up to the front mounted radiator. These pipes don't trap air, but they can rust or clog. I've been lucky so far, but I think I'd rear-mount a radiator(s) if that happened.
Anyway, that's part of the reason why I like the idea of rear-mounted radiators on front engined cars. I've seen that it is possible to drive a car with the radiator mounted on the opposite end of the car from the engine bay. All you need to worry about is AIR IN and AIR OUT, really. For guys on this forum, you wouldn't need to scoop much air at all.
The benefit of doing all of this is that you could seal up the whole nose.
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