Not a fan of Electric-Vehicles BUT...

The 6 is now the new performance engine, its been out for a couple years now and tested in the Wagoneer $$$$$
Hemis are just bread and butter engines in trucks. 5.7 are ok, and 6.4 are gas sucking pigs.
I got a 5.7 hemi in my ram...12 is the magic number

Buy my wife has the same 5.7 in her grocery getter and she gets a whopping 17 mpg