I too debated the hemi gen 2 or gen 3 options as well as a good small block strocker.
You have to ask yourself what you wish to accomplish.
How will you drive your car?
Do you want 400 HP, 500 HP, 600HP,
400 use the 6.1 500 6.1 or 426 600 426…
I think you could get 20 mpg out of the right 6.1 setup. (I will let you know)
If you want turnkey low maintenance efi …I would (did) choose the 6.1 (you can put a shaker on a 6.1)
But it’s your call.. BUILD WHAT YOU WANT! We will all watch and love it.
And drive it alot.
Ps. Indy has a new 426 hemi based off the 6.1…
IMO
Just found a part number for a turnkey 6.1 from mopar for under $9000.00 P5155067