Originally Posted by
stevieturbo
There's little doubt the iron block is stronger than the alloy.
Unless you absolutely need the weight reduction, I wouldn't bother.
A friend of a friend here is running their iron block, although I never got a chance to see it myself. Probably only around 600hp.
My thoughts exactly iron gotta be stronger, when I need new block will get one, they've only been tested to 600 hp so far so I'm told so will be a first at high 700s if/when it happens