6.1 or 6.4?

The 6.1 is a dinosaur at this point. Uses earlier electronics also. The eagle 5.7 is nearly as good. With a cam swap, it easily beats the 6.1. However 6.4 hands down if you are comparing to 6.1. And the best hemi of all, is of course a BluePrint 426 HEMI :)

Chrysler Gen III Hemi Compatible - 426 c.i.