Ok this wasnt meant to start a thread war...I didnt say aluminum blocks will just crack. The key words that you are missing from every single one of my posts is that "UNDER ENOUGH PRESSURE,TEMPS,and or LOAD" and aluminum block "WILL CRACK B4 an IRON BLOCK WILL" Not aluminum is crap cause it will crackimmediatly, not Id go iron cause aluminum is going to crack when you drive it. I didnt even say anything about horsepower or torque. ALL I SAID WAS THAT THE METAL IS MORE LIKELY TO CRACK B4 B4 B4 damnit B4 and Iron block will thats all. I didnt say Iron was invincible or that aluminum is made of copper and cracks when you start driving. Please don't put more to my posts than what im actually saying. I love you guys for the same reasons that all of us do. INFO...If my info is not worth being posted then i wont post. But if someone asks why they dont see alot of people doing something and only one answer is given I try to give a little more to think about incase they decide to put 1500HP in a truck that weighs as much as mine does. I was new once too and I had to learn this stuff just like everyone else