Just curious, not to derale the thread but did the blocks all of a sudden get way better (consistent) with the Magnum update, or was it more of a gradual thing that also affected the later LA engines as well?
Just my opinion but the LA mold were old and old tech, mags got a new mold(less wear and better tech(design/ideas) to help with core shift..........don't mean it still wont/don't happen.