5.7 HEMI Vs. 408 Stroker

A 408 stroker will be cheaper to build and will have monster torque, but a new Hemi will last longer and be better on gas overall. You also won't have to modify the rest of the car as much to handle the power of a new Hemi because they're pretty balanced. It's still a big project though and in the end IMO a 408 swap will be easier to achieve.