[Chevy454]

Your fuel will definitely make a difference. With our 10.2:1 L72, I had to be mindful of the type of fuel and the temp. When we mixed too much good fuel in we would actually have a problem not getting enough heat in our engine (mainly the heads)...especially in the spring/fall months. During cool nights at the track I'd have to make sure we were burning just a premium pump mix...if there was too much of the good stuff in the tank it couldn't get any heat in the heads and it would run like a dog.

Also, you need to know where your total timing is...the wrong timing can really cause you to heat up in a hurry. Oh, and I'd stick with the clutch fan setup...