I'm having a few issues with underhood heat in my BBC powered S-10 Blazer. I have a good Griffin radiator and 3 Spal 10" e-fans and an aluminum water pump. I currently do not have inner fenderwells and a stock flat hood. The engine runs fine and keeps relativly cool when driving. I do have a problem with the front brakes getting very hard and seizing the calipers when temps start to rise. If I open my hood and let the engine run the temp will go from 215 to 195 fairly quickly, so I'm guessing that the under hood air is overheated. This superheated air can not be good for horsepower either.

I've considered making some inner fenders to help keep the heat from the headers out, but what can I do about the heat from the radiator? Would some sort of NACA duct in the hood help? I know a bit about aerodynamics from some college courses, but I'd like other opinions.
Here is a link to what I mocked up today, as you can see space is limited.

http://www.cardomain.com/ride/753520/6

Maybe a cowl induction hood is in order. I'd like to use the flat hood for the sleeper look. I could possibly duct cool air from the area where the wiper rods reside in the cowl. How do I get all of that hot air out from under the hood?

I plan on adding a few ponies this winter and don't want to compound the problem. I was going to build a 540, but I'm broke. So I think I'm going to just change to some domed pistons so I can use an aftermarket aluminum head.

Oh yeah.

BTW - after I drive for a while the whole front of the Blazer gets so hot you can't touch it.