I'm not going to argue either point, but just add my opinion, while not directly basing my opinion on block DESIGN principles.
In my opinion, the iron was the better choice do to longevity and climate differences. Aluminum is more malible than iron, and when a car is expected to last well over 50,xxx miles with close to 400rwhp stock, than it's obvious that the iron was the better choice.
As far as the design of the actual iron block compared to the al. block, I have no clue of what's diff, but I imagine a LOT is different.
BOTH blocks can take the power, iron or aluminum, there is no doubt about it. As already seen with the LS1 crowd, people started switching over to the 6 liter IRON block, simply for a stronger foundation for a stroker motor, and the added reassurance.
As for myself, 100 pounds can be made up in horsepower, no big deal. I am happy with the iron block and do NOT PLAN on getting aluminum.
In my opinion, the iron was the better choice do to longevity and climate differences. Aluminum is more malible than iron, and when a car is expected to last well over 50,xxx miles with close to 400rwhp stock, than it's obvious that the iron was the better choice.
As far as the design of the actual iron block compared to the al. block, I have no clue of what's diff, but I imagine a LOT is different.
BOTH blocks can take the power, iron or aluminum, there is no doubt about it. As already seen with the LS1 crowd, people started switching over to the 6 liter IRON block, simply for a stronger foundation for a stroker motor, and the added reassurance.
As for myself, 100 pounds can be made up in horsepower, no big deal. I am happy with the iron block and do NOT PLAN on getting aluminum.