I have a feeling that any of the ideas about heating it with coolant is going to fall short of making any difference at all, because of the surface area of the aluminum and volume of air going through it.
You are going to have to heat the intake with oil from underneath to many any difference.
I think it would be fairly simple to fab air dams to block most air from flowing through the gap. That coupled with coolant fed copper rubbing would definitely go in the right direction
