Andy, I was talking more to Dave. I agree using aluminum makes the most sense today. But the vast majority of guys building these things are still using iron. Some with the understanding that they will not end up keeping them on there. And there's some misinformation regarding even their use on some setups due to advances in cylinder head understanding. (like Dwayne's...) I sympathize with you. But reality is there's still thousands more sets of iron being re-used than there are aluminum at this point. And many of the readers of the mags are the guys who will run iron first for budget reasons.