Gen III Hemi

MopaR&D said

With that said, a big cam, long tube headers into cat-less exhaust and optimized non-emissions tune will have a 6.4L pushing 600 HP at the crank.

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My stroked out 5.7 with headers, big cam, 18" of exhaust pipe after headers and 13.5:1 compression is making around 700hp at the crank, so a 6.4 should easily make 600hp.
BTW I have the same intake.