When I finally build the 440/512 stroker for the Challenger I'm planning out, I'm debating between using the original iron block, or an aftermarket aluminum block. I'm not planning to put this thing over 600-650 horsepower, and it will be mainly used as a roadtrip/occasional daily driver/occasional weekend at the track car. My questions are, with those things in mind, will an aluminum block hold up as well as iron? How do the two compare in terms of longevity and reliability? Also, are the weight savings worth the extra money in terms of performance and handling? Also, if doing a 512 stroker kit in an aluminum block, would that entail boring out the cylinders? If so, would I need larger iron sleeves, and where would I get those?