Basically, back when I did this, I noticed approximately 10 - 15 degree difference with the dishes cut out. That was back when I had my NA engine and I had my thermometer monitoring ambient under-the-hood temps. Although I am not monitoring these ambient temps any more, I can at least feel a much warmer temperature under the hood of my 4A-GZE compared to the 4A-GE setup. So what I really want to do asap, is cut the hood out and weld on some more vents, etc. Proving this allegation is when driving w/out my hood, the intercooler piping is cooler to the touch.

Here are a couple more pictures..