Thanks for the replies and info guys, it gives me some perspective. I wasn't really looking for heads these just fell into my lap. My car goes 10.20's in the heat and I have no desire to go under 10.0 at this time due to the expense and hassle thats involved. I think it's time to think about building a new short block though as the one I'm currently running has over 2600 passes on it and still going strong! I have a 400 cold weather block I will probably use and put my Eddys I have now on it.