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So, a little context. Right now I have a built 360 with a 268 cam that makes 438 lb/ft at 2500 rpms and it peaks at 467 lb/ft at 4500 rpm (to the crank). I was thinking of swapping in either a 6.1L or a 6.4L, my questions is what upgrades can I do to the HEMI to make that amount of low end...