And to add:

It seems that your setup is similar to (A) above.

With my true DCAI, my Intake Air Temperature is never higher than 12 degrees F above ambient, except while idling. I hate to say this to a person who obviously likes to do his own work and likes to sort things out, but, it doesn't matter how much cool air you "funnel" through those 2 oblong holes in the radiator support. 100 times as much goes through the radiator to be nicely heated for your use.

Please read the data above?